DFS Simulator

DFS Glossary: Every Term Sharp Players Actually Use

By DFS Simulator TeamPublished July 27, 202610 min read

Every term sharp DFS players actually use — with a real definition and (where relevant) a link to a deeper piece. Alphabetical within category so this doubles as a reference you can jump into mid-slate when someone drops a term you don't recognize.

Contest types

Cash game
Any DFS contest with flat payouts, typically top ~44% of entrants doubling their money at ~1.8x buy-in. 50/50s and double-ups are the canonical formats. See cash game strategy.
GPP (Guaranteed Prize Pool)
A tournament where the prize pool is guaranteed by the site regardless of whether the contest fills. Top-heavy payouts — first place often wins 15-25% of the pool. High-variance format; most winning DFS players skew cash-heavier than GPP-heavier.
Overlay
A GPP that didn't fill to capacity — the site pays the guarantee anyway, meaning every entered lineup has positive expected value from the shortfall regardless of construction quality. Announced 10-30 minutes before slate lock; sharp players enter reflexively.
Satellite
A contest whose prize is entry into a higher-buy-in contest rather than cash. Effectively a bankroll- leverage tool — a $5 satellite winner enters a $25 GPP for free.
Single-entry tournament
A GPP that limits each user to one lineup. Smaller fields, sharper opponents on average, but every entry counts equally.
Millionaire Maker
DraftKings' flagship NFL GPP with a $5M+ guaranteed prize pool and 200,000+ entries. Dominated by professional multi-entry portfolios.

Roster construction

Stack
Two or more correlated players in the same lineup — typically same team (QB + WR in NFL, top line in NHL, batting order in MLB). See stacking strategy.
Bring-back
A player from the opposing team of a stack — added to capture the correlated upside of a shootout script. If the stack needs a high-scoring game, the opposing offense benefited too.
Punt
A minimum-salary player whose projected floor is low but whose usage bump (from injury or coach's decision) creates a value spot. Used strategically to free salary for stars.
Chalk
The highest-owned play at a position — the obvious pick that a large percentage of the field will roster. Chalk works in cash; carries opportunity cost in GPPs.
Captain / MVP
The single-game DFS multiplier slot — DraftKings Showdown uses a 1.5x Captain, FanDuel Single Game uses a 2x MVP + 1.5x STAR + 1.2x PRO structure. The Captain pick is the leverage decision that decides single-game GPPs.
FLEX / UTIL
Position-flexible roster slots. DraftKings NFL has a FLEX (RB / WR / TE); NBA has UTIL (any position). Used to fit the best remaining player regardless of position.

Math + strategy

Correlation
The degree to which two players' fantasy outcomes move together. QB + WR is highly positively correlated (a QB's TD is his WR's TD); QB + opposing defense is negatively correlated.
Monte Carlo
A simulation technique that runs thousands of randomized outcome samples to estimate the full distribution of possible lineup scores. See Monte Carlo simulation explained.
Ceiling / Floor
The 90th and 10th percentile outcomes from simulation. GPP construction sorts by ceiling; cash construction sorts by floor. The gap between ceiling and floor is the honest variance measure.
EV (Expected Value)
The average outcome across the simulated distribution. Not the same as ceiling or floor — a high-EV lineup can have low ceiling (tight distribution) and a low-EV lineup can have high ceiling (blowout tail).
Leverage
Ceiling divided by projected ownership — how much differentiation a play provides per unit of expected upside. GPP construction sorts high-leverage plays first. See ownership and leverage.
Ownership
The percentage of the field that rosters a specific player. Site-published post-slate; projected pre-slate by DFS analysts. High ownership = "chalk" = low leverage; low ownership = "contrarian" = high leverage when the pick hits.

Workflow + discipline

Late-swap
Site feature allowing you to replace players in a lineup after the first game of the slate has locked, up until the specific game your player is in kicks off. See late-swap strategy.
Exposure cap
A portfolio-construction limit — no more than N% of your lineups can share a specific player, team, or stack. Prevents catastrophic damage from single-player failures. See exposure caps explained.
Contest selection
The discipline of choosing which contests to enter based on rake, field size, payout structure, and your edge — often more impactful on ROI than lineup construction quality. See contest selection.
Bankroll
The total capital you have available for DFS. Standard discipline: 30x nightly buy-in for cash-heavy play; 100x for GPP-heavy play. See bankroll management.
Rake
The percentage the site takes off the top of the prize pool. Standard DFS rake ranges from 7% to 15% depending on contest type. Rake dominates modest skill edges.

Related

Frequently asked questions

What's the difference between GPP and cash in DFS?

A GPP (guaranteed prize pool) is a tournament with a top-heavy payout structure — first place often wins 15-25% of the prize pool; only the top 20% of entrants cash. A cash game (50/50, double-up, head-to-head) has flat payouts to roughly the top half of entrants. Different formats reward different construction: GPPs want ceiling, cash wants floor.

What does "leverage" mean in DFS terminology?

Leverage in DFS is the difference between how much of the field owns a player and that player's projected ceiling contribution. A high-ceiling player at low ownership is a leverage play — you win harder when they hit because fewer competing lineups share the same upside. Leverage math is what powers GPP construction and matters much less in cash games.

What is a "bring-back" in DFS terminology?

A bring-back is a player from the OPPOSING team of a stack — typically added to capture the correlated upside of a shootout game script. If your QB-WR stack needs a high-scoring game to win, the opposing team's receiver also went off in that universe. Common in NFL and MLB GPPs; rarely useful in cash games.

What does "chalk" mean in DFS?

Chalk is DFS shorthand for the highest-owned play at a given position — the "obvious" pick that a large percentage of the field will roster. Chalk is fine in cash games (high ownership means the field agrees with the projection) but is a mixed play in GPPs (rostering chalk means winning shares equity with the field).

Where can I find blog posts that go deeper on each glossary term?

Each term below links out to a dedicated blog post where relevant. The most-referenced posts: stacking, ownership + leverage, Monte Carlo simulation, bankroll management, contest selection, cash game strategy, and late-swap. See our /guides page for the full organized index.

Keep reading

Put the theory into practice

DFS Simulator runs correlated Monte Carlo sims across 21 sports — up to 50,000 iterations per slate, from $19.99/month.