The act of taking a shit on someones chest before during or after sex (can be used as a punishment, break up tactic or fetish act) Very similar to the Cleveland Steamer, but with the Boston Steamer, you also tea bag her with you nut-sack while taking the shit.
by AT Facials June 11, 2004
The true boston steamer is a sexual act (fetish). It is when one person craps on another person's face and then sits down and rocks back and forth like a steam roller.
by Dan Herald March 15, 2007
Leaving a steamy pile of shit on top of a glass table while somebody is laying under the table face up.
by alphahooker November 22, 2004
A now ex-girlfriend left in the snow naked and unconscious due to being roofied with a steaming pile of shit on her chest.
That Boston Steamer in your yard brings back memories of beautiful winter days back home in Massachusetts. What a work of art, a borderline masterpiece. I like how you threw in that Dirty Sanchez to emphasize cultural diversity.
by Jason Chilton February 21, 2020
The act of ending a relationship by depositing a steaming pile of feces on the back of a sleeping lover after a night of passion followed by a hasty departure.
by Poop November 15, 2003
A Boston Steamer is 70's term named for a certain 1970's celebrity that liked getting his dick sucked while he took a shit. Hence, a blowjob while your shitting is called a Boston steamer.
After the concert the singer went up to the hotel room and had a groupie give him his favorite: a Boston steamer.
by Ehusserl April 30, 2010
to grab someone by the neck and drag them out into the snow outside and the open there mouth and crap in it.
Joey was pissed at his drunken friend Dan who slept with his girlfriend so he took him outside and gave him a Boston Steamer
by William Ethier March 12, 2003