All‑In
All-in means putting all of your remaining chips into the pot.
The simple explanation
All-in means putting all of your remaining chips into the pot. When you go all in, you cannot bet any more in that hand, and you can win only the part of the pot your chips can cover. If other players keep betting after you, their extra chips go into a side pot that you cannot win.
A closer look
Going all in can be a value bet, a bluff or the last chance of a short stack. A player who is all in does not have to act on later streets, and the remaining cards are dealt out. The pot is then split into a main pot, which everyone contests, and side pots for those still betting. Understanding which pot you can win is important when deciding whether to call a shove.
A practical example
A player with 40 chips left calls a 100-chip bet all in. He can win only the main pot formed from the chips he matched.
Full explanation
All-in means putting all of your remaining chips into the pot.
All-in means betting all your remaining chips on a single hand. It is often used when a player has a strong hand but not enough chips for a normal bet, or as the last attempt of a short stack.
Once a player is all in, he cannot take any more actions. He cannot be forced out by further bets, and his hand is shown at showdown.
If the other players continue to bet, a side pot is created. The all-in player cannot win it.
The related terms are going all in, shove and jam.
Alternative spelling: all in, allin