When your poop contains enough water to spray.

Also, a Cleveland Steamer gone horribly wrong.
Gah, just had a fire hydrant from that burrito yesterday. That skeezar waitress must have put something in it.
by Tray Graham March 25, 2005
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When the girl you're hittin' doggie-style throws up mid intercourse. "Hydrant" because of dogs and doggy-style. Harlem because of how the fire department opens up the hydrant spout on hot summer days so the kids can play in the spray.
Harlem Hydrant!
by posaune1 June 04, 2011
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Getting blood over your dick after rooting someone up the ass.
I was rooting that girl and got a fire hydrant last night.
by OldManSack February 07, 2012
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Term that describes one that is a douche, douche bag, douche nozzle, jackass, fucker, asshole, etc.

Person 1: That guy was such a douche
Person 2: Yeah, a big one too, pretty much a douche hydrant all around.
by Junta December 16, 2006
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Inappropriate acts seen in public, such as dry humping inanimate objects
They saw a boy on the street having a little "too much fun" and called out "fire hydrant"
by Mollythemallcop September 24, 2018
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The act of a man or boy of having a boner
a fire hydrant is an inside joke used between my friends.... meaning when a fugly guy sees a hot woman (us) and gets the urge to come and fuck us getting a boner.
by Brosephine kasberger January 23, 2017
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During sexual intercorse you piss and nut in the chicks ear.
Ya she still can't hear her boyfriend decided to pull a reverse fire hydrant on her.
by Cripple420 December 12, 2019
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