this is a game played with two alcoholics trying to get drunk with eachother. One person buys two shots for the two of them, then the second person buys two shots. This continues until you are sufficiently drunk or blacked out preferably
phrase: Shorter people joking about their hight will say this. For the sexual meaning of it a man can have his face in her boobs, or a woman can have her head in his crotch.