To bullshit someone. Pull thier leg. Being sarcasticly serious.
Joe: I smashed box with a 300 pound wildabeast yesterday.

Jordan: Are you horsing me right now? A 300 pounder?
by Troy16 February 12, 2008
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Derives from the use of the word 'riding' to refer to sexual intercourse. It is undecided as to whether the word can be used only if the subject of the verb was on top (the one doing the horsing).
I was horsing my boyfriend all night.

I horsed a hoe on the back seat of my dad's jeep.
by sosweet August 17, 2007
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The easiest way to decribe someone that goes to ride horses at events aka: equestrian
She had a horsing advent to go to on Sunday
by Abigail Ruksznis June 08, 2005
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verb: drinking excessively, doing drungs excesively, having sex very rough with no respect for the girl, beating someone down
ive been horsing beers all day, i horsed a fat line last night, i horsed her so good she wont walk straight for a week, i horsed this dude repeatedly until he was in convulsions.
by R Burgandy August 28, 2007
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The consumption of alcohol in large quantities
Huss: Are we horsing tonight
Tim: We sure are boy!
by k846 March 06, 2007
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pl. Horsin' it, or Horsing it.

To over-do.
To rush.
To try too hard.
Quick to and end.
Don't drive so fast, you're horsin it.

I know you like her, but don't horse it, she needs space.

Look at that hyper-ass cat...horsin it man, horsin it!

Bush is horsin the war.

Don't horse the brake, I'll spill my coke.
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