When the inbox for your internet email address becomes loaded with junk mail because of irresponsible internet surfing.
by Ereck Flowers May 03, 2019
Sinbox (noun):
A vagina - particularly one belonging to a female co-worker, or a girl you meet on the internet.
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!"
Ian: "Oh maaan! I totally delivered in her sinbox!"
by ENLS March 09, 2009