(verb) To defecate within the cleavage of unsuspecting female, with intent to follow standard motorboating protocol.
Oh man, last night I took my date to the mexican restaurant down town and then I totally had a hot steam boat later
by bennybenbenben November 16, 2008
Top Definition
To get completely, hopelessly and utterly drunk or "off yer face". Words and phrases of the same definition include "steaming", or "getting boats".
Me and the boys are getting on the steamboat tonight!
by m January 26, 2004
When you are wearing a turtleneck sweater and you fart, the fart gasses will travel up your pants, up your sweater, and exit through the turtle-neck opening at the top of your shirt. The turtle neck acts similar to a funnel on a steamboat (aka steamship, steamer).
After finishing a two-pound burrito and leaving the restaurant in his turtleneck, Javier was farting so much he resembled a paddle steamboat traveling down the Mississippi.
by Gullywood Productions November 27, 2014
To be intoxicated on alcohol to a moderatley but managably high level.
I'd hud 7 pints and then stotted up the road, steamboats, like.
by hostage March 12, 2005
While suffering from acute flatulence, stick your ass in a girls breasts and fart. Related to the motorboat. Not to be confused with the hot carl or the cleveland steamer.
After eating Chipotle for dinner I had such bad gas I gave my girlfriend the steamboat last night.
by KingCox February 05, 2006
The act of inhaling marijuana smoke, then exhaling it while performing a standard motorboat
Guy 1: what did you do with that girl last night?

Guy 2: we were smoking a blunt and I steamboated her titties.

Guy 1: Nice!
by I<3 Smokin' Titties October 29, 2012
Scottish terminology for being drunk.
"Well, I was once out at a local pub watching an Irish band, had too many whiskeys, and got steam boats."
by Steven, credit to Molly May 24, 2008
Act of jiggling head left and right between an older woman's breasts. See Motorboating
Jay picked up Ethle from the retirement castle, took her to a nice steak dinner, and got to steamboat her flapjacks.
by Andysue28 January 15, 2015

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