21
A word use to describe when someone usually an infant takes a crap and it gets smeared all over its back.
"That baby is a "brownback" since it got shit all over itself"
by joe west November 10, 2006
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22
The act of having unprotected anal sex using your partners fecal matter as luberication.
The governor of Kansas brownbacked his aide Jesus so hard he had poo splatters all over his desk.
by Way dog February 13, 2015
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23
Area of fecal smearing in the lower back done by the penis during or at the end of anal intercourse, caused by the bottom partner a priori failure to clear their bowls.
After fucking her in the ass, I gave her a brownback.

While fucking my ass, he pulled out and gave me a brownback.

One of the benfits of double penetration is the possibility of instant double brownback - that's why you should try it!
by crycrybabycrybaby February 12, 2015
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24
The act of receiving anal intercourse from a foreign day laborer.
I went to home depot in hope of getting brownbacked in the parking lot.
by foulness November 28, 2011
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25
Noun: a man's anal cavern that has been smeared with feces after receiving anal sex.

Verb: to rub feces off of one's penis between the other man's butt cheeks and around his anus from which it was originally located.
Rick decided to give Sam a brownback after their session of passionate love making. While rubbing his cock in between Sam's buttcheeks, Rick felt santorum slowly begin leaking onto his shit covered, semi erect penis.
by Brownbacker420 June 26, 2015
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26
When a person smears Santorum on another person's back after anal sex.
"Hold still, I'm not finished brownbacking yet!"
by Kama Sutra Scholar February 16, 2015
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27
A type of anal sex wherein the receptive party has an anal cavity full of feces.
"You want to do anal? Ok, but I haven't taken a shit all day. Hope you're ok with brownback."

When John forgot to douche before bottoming for Harry, their bareback sex quickly became of the brownback variety.
by Banana_man1987 February 12, 2015
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