Big stack

From PokerWiki

The big stack is a poker term meaning the player with the most chips at a poker table. This term is usually reserved for a player with significantly more chips than any other player. It is also sometimes called being chip leader at a table. (e.g. "You're big stack now! You can't go broke!")

A large stack of chips itself is also sometimes called a big stack (e.g. "You've got a big stack!"), or a deep stack. This is true even if the stack is not the largest stack at the table. There can be more than one player with a big stack, but only one player is the big stack.

The opposite of big stack is short stack.