Bumcrack

An inch long crevice found on the derriere, that has escaped the modest covering from trousers.

"Cor, look at her bumcrack, the dirty slapper! You could park a car in that!"

by BumcrackTheDog November 02, 2004

Geeked your pants

When one has commited a particuarly heinous act of cleverness, nerdiness or Hermione-ness. Stupid boffin.

"Eurgh, what's that smell? It must be Dexter, he's geeked his pants well and proper this time!"

by BumcrackTheDog November 15, 2004