a rabid blow
When a girl drops mentos in her mouth and pours diet coke on her guy's cock and face. The foam shoots out like a rabid animal trying to bite your junk.
My friend's girlfriend did this to him at a restaurant. The waiter came back with a mop.
My brother did this to his girlfriend in the car. She screamed like a banshee.
My teacher did this to my principal during parent-teacher night. The school was in shock.