Top Definition
A type of Texas Hold 'Em player. The All-In Hero has no actual skill in the game of poker, and the only way he can win is by constantly going "All-In" (betting all his chips in one bet) before the flop.

Most all-in heroes are the biggest suckers at the table, and even a player of moderate skill will bankrupt and All-In Hero eventually.
"I bankrupted that All-In Hero when I called his stupid bet with my with pocket bullets."

"What'd he have?"

"2/7 offsuit."

"Fucking dumbass, gotta love All-In Heroes."
by The Man In Black March 12, 2005
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