A game in which an underclassman girl is placed under a table with several guys sitting around said table. The girl then proceeds to fellate one of the guys, and it is his job to keep a straight face. If the male receiving fellatio gets called out by the others he loses.

A face on a person that shows no emotion, often called poker face because in the game of poker it would be foolish to show any emotional traits that might screw the game for you.

Lady Gaga claimed on interview with Jonathan Ross on Friday night with Jonathan Ross. A TV program in the UK that her song 'Poker Face' was inspired by when she used to ''make love'' to her ex boyfriend and she would pretend that he was a girl and that they were having lesbian sex but without telling him, Hence the term 'Poker Face'

an expressionless face(becuase people keep thier faces expressionless during a game of poker)

how to wake up lady gaga
it means: poke her face

(in poker) An impassive facial expression cultivated to prevent other players from determining whether one's actions in the game are the result of a quality hand, or of bluffing.
(Lady GaGa's song) similar expression used to prevent giving away one's motives, feelings, or situation. Like in that song when she pretends to like the guy but she's actually thinking about girls.

staright faced. since you have to keep a still face while playing cards.