4Bet

1. The act of raising a 3Bet, or in other words, the final bet in the sequence of Raise - 3Bet - 4Bet.

Explained

A 4Bet occurs when a player raises a 3Bet. For example:

Small & Big Blind Post
1. "Player A" in mid position makes a raise.
2. "Player B" raises the bet (this is a 3Bet).
3. The Action returns to "Player A" who makes a re-raise (this is a 4Bet).

Ranges

Typically, 4Bet ranges while playing No Limit Texas Hold'em games aren't bigger than 1-2%, meaning most players will only 4Bet hands such as QQ, KK or AA.