1. Equivalent to expressions such as "God damn!" or "oh my God!".
Used at a time when something awesome or unbelieveble happens.
*Old man Bubba rams into the back of skater Bob's car*
Skater Bob: sweet fuck!
*Old man Bubba gets out of his car*
Old man Bubba: Sweet fuck!
*crowd gathers around the accident site*
Crowd (in unison): sweet fuck!
A guy who seems like he could be relationship material, but is actually just a fuck boy who wants to get into your pants
Girl #1: I've been talking to this guy Sam, and he's sooo sweet and super cute Girl #2: Oh Sam? He's just a fuck boy in disguise
Girl #1: He's a sweet fuck boy?
Girl #2: Exactly