1, A shot in bowling where the only pins left are the 7 and 10, which are on each side of the lane.
2, An extremily wide punani, so called because of the imposible-to-hit shot in bowling
3, When the space at the top of a woman's legs is very far apart, usually indicating definition 2.
1, Oh, dang. How am I supposed to get a spare now? It's a 7-10 split!
2, Charmaine's been fucked so many times that she's got a 7-10 split!
3, Tiffani's too much of a sket. Look at her legs! For christ sakes shes got a 7-10 split!