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refers to doing something before the actual event aka the "flop"
Man 1: Bro we goin to the knicks game?
Man 2: Yea bro u wanna grab some beers preflop
Man 1: yezirr
by A-FERRRR November 20, 2009
In poker, any betting, folding, or calling that happens before the first 3 community cards are delivered, aka the flop.
He raised and I went all in preflop.

With all the action preflop, I was surprised nobody bet postflop.
by Scooby doo where are you January 31, 2011