Implied Odds
Extra money you expect to win on later streets when your draw hits.
Raw pot odds sometimes undersell a call. If you have a nut flush draw against a deep-stacked opponent who is unlikely to slow down, the chips you'll win after hitting your flush are part of the call's true value — those are your implied odds.
The opposite is reverse implied odds: hands that hit and still lose money. Bottom two pair on a wet board often has terrible reverse implied odds because every scary turn card costs you another bet.
Rule of thumb: implied odds are bigger when stacks are deep, your opponent is loose, and your hand is well-disguised. They're smaller when stacks are shallow or your draw is obvious.