Go in ( poker )
1) Put money into a pot, thereby remaining eligible to win the pot.
2) To run out of chips while betting or calling. In table stakes games, a
player may not go into his pocket
for more money during a hand. If he runs out, a side pot is created in which
he has no interest.
However, he can still win the pot for which he had the chips.
Example: "Poor Bob he made quads against the big full house, but he was
all-in on the second bet."