bonesaw
An exclamation used typically in two situations:
1. After a tremendous diss. Might replace the word "BURNEDD!!"
2. Immediately following a very impressive or incredible event
guy: hey baby, you wanna get together?
girl: fuck off you sleaze
guy's friend: BONESAWWWWW!!!! (right in guy's face)

*person does a standing backflip*
observer: BONESAW!!! That was the shiznite!