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.
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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.
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The act of taking a hit of weed then going under water and blowing out all the smoke. The bubbles will then pop at the surface of the water and smoke will come out resembeling a steamboat.
Randy: Bill you'll never believe what happened last night at Joey's house.
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.
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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!
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This is a combination of a Cleveland Steamer and a Motorboat. It is when a man (or woman) excretes feces on a woman's breasts and then Motorboats her.
Man 1: Dude my friend Steamboated his lady last night.
Man 2: NO WAY! That is the Grossest thing I've heard of!!
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Steamboating is a sex act that involves farting into a plastic bag and then putting the fart-filled plastic bag over your partner's face to let them inhale your farts.
Kelly: Josh wants me to steamboat him. Should I?
Jenn: What's steamboating?
Kelly: Um it's kinda kinky... it's when you fart into a plastic bag and then let your partner smell it.
Jenn: Oh! Ben and I do it all the time! It really turns him on!
Kelly: Guess I should too then...
Jenn: You should! It's the best
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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.
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