A video that has a man getting a horse and shoving the horse's penis in the man's asshole. The man died the next day because the horse's dick was so long that it ripped the man's colon open.
Dude 1- Yo man, we should watch 1 man 1 horse
Dude 2- That's fucked up man, the guy died from that shit!
by hoopla_69 October 22, 2013
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When you insert Ketamine up inside your arsehole and trip the fuck out
Yarrrrrr lad, I absolutely 1 man 1 horsed the mrs last night
by SalfordMandemOnTheWall January 23, 2020
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You're fucking a girl in the ass and she tenses up so tight that the inside of her large intestine rips off onto your dick and then you start fucking her in the vagina, using the intestine as a condom so she doesn't get pregnant.
Dude, did you hear mercer hit her with the horse man's revenge last night?
Her ass will be sore for a fortnight.
by sam brenner November 10, 2009
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It means to politely excuse yourself from a situation to go to the restroom or buy a drink. It originated from men disappearing to go bet on horse or dog races. See a man about a dog means the same thing.
The earliest confirmed publication is the 1866 Dion Boucicault play Flying Scud in which a character knowingly breezes past a difficult situation saying, "Excuse me Mr. Quail, I can't stop; I've got to see a man about a dog." In a listing for a 1939 revival on the NBC Radio program America's Lost Plays, Time magazine observed that the phrase is the play's "claim to fame".

During Prohibition in the United States, the phrase see a man about a horse was most commonly used in relation to the consumption or purchase of alcoholic beverages.
by Coweyes February 21, 2013
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Any general business that needs attending to that you may not care to discuss whith the present party.
We can meet for lunch on Tuesday, since I'll be in the area; I have to see an man about a horse.
by moth17 July 5, 2005
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A discreet way to leave the table at a restaurant to go to the restroom; derived from a 1940's black-and-white film (sorry, cannot recall the name) where an actor literally says it as he leaves a table to see a man at another table about a horse.
by James Pettit August 3, 2005
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A more polite method of informing people you have to go number two.
Excuse me for a minute, I need to go talk to a man about a horse.
by asixe April 5, 2006
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