back boob

In a picture posted on the GameFAQs forums by AlienNine, of his girlfriend's back tattoo, there appeared to be a boob on the back, slightly below the arm.. Yes, a boob on his girlfriend's BACK. Of course, even the dumbest little 12 year old could figure out that it's fat, but...we JUST don't care. Since that day, the "back boob" has become the new...well, the new "confirm/deny". That easy.

Dude, $5 a frieken back boob!

by Anemic Royalty September 21, 2006

BPB (Back Problem Boobs)

Boobs that are so large that they cause back problems.

Yo man, that girl is stacked. She's got a mad case of BPB (Back Problem Boobs).

by boob enthusiast February 11, 2010