look up any word, like sex:
 
3.
Noun. Boo-ty-Bud-dy.
1. A good sex-partner; usually in the same military branch. A butt-buddy.

2. A sexual partner, especially of the same sex (usually male). The one being screwed wildly in a tag-team buddy system.

3. Friend with "special priviledges", cum-chum.
This being his first week in boot camp, Julio had no idea he would be the victim of the largest fuck-fest free-for-all known in recorded military history.
by Funk N' Wagnails June 11, 2004
 
1.
Not exactly a fuck buddy but someone who you have friendly conversation with just before and after sex during regular booty calls.
“Nick is a great Booty Buddy but I just don’t think we’d get along if we spent time together not having sex.”
by Brett Burkhardt April 27, 2008
 
2.
cut friends, sexual partners (usually secret) with no formal romantic relationship.
I don't want agirl friend, but we can still be booty buddies.
by jason October 16, 2003