2. a chant which is shouted by yourself and a group of friends when you are leaving the pub/club/bar and are walking down the street, after a heavy drinking session
2. me and the lads where shouting "STEEEEEEAM BOOOOOAT" all night last light, and we woke some old lady up!!
Bill: What the hell happened man?
Randy: We were all in the hot tub smoking some white widow and i looked over at waka and he was doing the mother fucking steamboat.