The act of fingering two girls at the same time, one on each side of one's body, hence resembling playing a pinball machine; the female equivalent of skiing
Dude look at those twins over there - I'm totally gonna pinball them tonight.
An incorrect word used by n00bs when they mean to say nubcake, but they are not 1337 enough to use such language properly, and thus themselves become nubscakes.
n00b: oh man i pwned that kid he was such a nubscake!
1337 gamer: you mean nubcake?
n00b: uhh.... yeah
1337: friggin nubscake....