A term used to describe a sexual act in which a man ejaculates into someone's asshole, and then sticks a straw in that asshole and sucks out the sperm.
A man ejaculates into a persons asshole then before sucking the jizzout with a straw he adds a scoop of ice cream at the top of the ass crack that will slowly melt down towards the asshole.
Wanna try the Shrimp BoatCaptain a la mode? Trust me and bring some ice cream.