Noun. Similar in meaning to a booty call. To use someone you do not particularly care for, but put up with nonetheless because of his/her ownership of a boat. Usually made when you are in desperate need of aquatic fun and games and have no boat of your own.
It's almost summer, I need to get started on my boaty calls.
Girl 1: Nate got a new boat.
Girl 2: Who's Nate?
Girl 3: My new boaty call.