Getting 10+ each of any two of the following categories in a game of basketball: points, rebounds or assists. Related to "Triple Double" which is 10 or more of all three in a game. Literally double (2 of) double (digit stats).
In last night's game, he scored 14 points and had 10 rebounds, for his first double-double of the season.
When someone goes to second base on a girl using both hands on both breasts at the same time.
Sam wasn't satisfied with going to second base once and wasn't quite ready to get to work on her third base, so he lifted the bra off of Sandy's other boob and worked on that. It was a textbook double-double.