Definitions by ENLS

Sinbox 

Sinbox (noun):

A vagina - particularly one belonging to a female co-worker, or a girl you meet on the internet.

Leroy: "What's up, dude? How'd your date with that chicky from work go???"

Ian: "Oh maaan! I totally delivered in her sinbox!"

Sinbox by ENLS March 9, 2009