When you blast a friend up the butt while either high or drunk.
"Dude get off billy, your a fricken buddy blaster!"
by Branden April 13, 2005
Buddy blaster is a term coined for American Forces because they seem to be killing their own people due to friendly fire all the time.
Careful....those Americans are Buddy Blasters
by Sonny Jandu October 19, 2004