The part of dry cereal that ends up in the box rather than the inner bag due to slipshod pouring of said cereal.
This Fruit Loops box has some serious cereal backwash issues!
by ForestDad December 30, 2022
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Vodka that has been opened or was open for a while
Tim: dude we don’t have vodka

Steve: Just grab the backwash vodka!!! Hurry we’re gonna be late
by Satansbaby310 November 15, 2018
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when you creampie someone's vagina and then suck it out, swishing it around your mouth to then spit it back inside their vagina.
"i gave my S.O a creamy backwash last night. she was disgusted with me"
by MC,shizzle October 15, 2023
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The little shit particles that fly out of you toilet onto the wall after flushing. More common after a full night of drinking Hand sanitizer and Rez wine.
by Donytellanyone April 23, 2022
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When a coked out white girl with poor dental hygiene backwashes into your draft beer at a Nickelback concert.
Hey bro Lisa was railing it up hard after supper last night and later on at the show she Calgary Backwashed chunks of hot dogs and onion rings into my beer.
by Jeromeleggings February 27, 2022
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The act of ejaculating on your partner and then getting some wet or dry pasta and smearing it with your penis
Vito said he's going to get Marcella an Italian Backwash
by Aydyn February 27, 2017
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Kissing a girl who has sucked a dick without prior knowledge.
"Did you hear? The Prom King got a Somoan Backwash"
by DoctorBadDragon November 20, 2016
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