to be extremely drunk. to drink in excess of 15 beer.
let go party and get boat gased as fuck.
A boat full of loco (Boat Loc) or crazy as FUCK.
This mothafucka is boat loc!
A teenage male who is generally a boarder that is usually the best at sports such as cricket. A gilly boat gets dirty easily, and can often be quoted asking for a wash.
He looks like he will be a gilly boat when he gets older.
The act of motor boating a set of old saggy tits
You give that old girl a leathery boat last night you funny cunt
A slow and deliberate face to breast oscillating motion.
Mark Twain is slowly steam boating his way through the golden girls.