When a guy or girl cums in your mouth and you hold it in your mouth only to deposit the goods into their mouth
Man that chic looked like a geyser when I give her a backwash. Dude that's awesome. Next time I see her I'll call her old faithful.
by BigDaddy_P April 9, 2017
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Backwash is when particals in your mouth, (eg. food) are pulled back into the bottle by reverse suction.
Oh man, check out the backwash crackers in that bottle.
by Tim Wells September 13, 2005
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The sediment and/or particles of whatever you're eating that ends up in your drink.
William- "Hey Sven, what are those floatin' things in your cup of Perrier?"

Sven- "Just some backwash of water chestnut and sesame"

William- "Why on gods green earth were you eating water chestnuts and sesame seeds?"

Sven- "I.. dont.. know..."
by The_Buddy August 18, 2011
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A man who is known for fisting his own butt hole while wearing sharp, intricate hand jewelry such as rings and bracelets which in time scrape the insides of the colon and cause rectal bleeding. The jewelry is then put in food to surprise one's partner as a gift.
WOW that guy is a backwashed! He put that jewelry in some hamburger helper and proposed with that shit. Shit was so cash.
by brantleyboy September 3, 2009
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When you come inside a females orifice (preferably asshole) and proceed to suck it out with your mouth.
I heard that Nicolas was backwashing Jennifer's asshole last night.
by RaginAsian0 March 15, 2017
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When you suck a guys dick, and you hold the cum in your mouth and then exchange it back to him through a kiss.
Damn that backwash cum tasted so good after last night.
by 0dharpsand0flats November 27, 2019
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