Daggering
Daggering is when a guy and a girl grind like they're trying to get each other off on the dance floor. They fake doing the nasty, and sometimes it gets so rough, you think they're gonna tear each other apart.
'I was daggering with my crush at the club, and I swear his hips were trying to break my back.'
'She started daggering with a guy I didn't like, and now I’m mad.'
'He said he’d dagger me if I didn’t stop talking.'