Overbet
A bet larger than the size of the pot
Definition
An overbet is a bet larger than the pot (125%, 150%, even 2× pot or more). Long perceived as a maniac's move, it has become a central tool of modern solver-driven strategies, on textures where it maximizes pressure and value. An overbet is polarized by nature: it represents either a very strong hand or a bluff — never a medium hand, which has no interest in inflating the pot. The structural condition for overbetting is the nut advantage: when your range contains the strongest possible hands and the opponent's range is capped (they would have raised earlier with their monsters), you can bet huge without fearing much. On the defensive side, the overbet crushes the opponent's MDF: against 2× pot, they only need to defend ~33% of their range, which means they fold a lot — and your bluffs, chosen with blockers to the hands that call, become highly profitable. The price to pay: every failed bluff is expensive, hence the importance of disciplined frequencies.
You open the BTN, BB calls. Board A♠K♥5♦-2♣-7♠: BB's range is capped (with AK, AA or KK they would have 3-bet preflop) while your range contains all those monsters. The solver overbets ~150% pot on the river with two pair and better for value, and bluffs like Q♠J♠ or QT (missed gutshots that block the straights... and beat nothing at showdown).