The action of pulling off a used condom after sexual intercourse and spinning it in a propeller-like motion, and then proceeding to slap one's partner across the face with it (likely breaking the condom and spewing its contents across his/her face.)
Yo Louis you shoulda seen it last night man, after we finished banging we fell asleep, and I woke her up the next day with a whirly bird. It was Epic!
A whirly whirly is a dust cyclone that will fucken anal rape u especially if ur involved with tennis, they r deadly and their name shouldn’t be taken lightly.
As five tennis people traveled down to NSW their coach pointed out a fucken deadly whirlywhirly