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"the other man" in spanish slang... you know.. that guy your girlfriend is cheating on you with...hey, I know this... this is my last name!
"I don't practice santeria
I aint got no crystal ball.
I had a million dollars but i'd,
I'd spend it all.
If i could find that heina and that "sancho" that she's found,
Well i'd pop a cap in "sancho" and i'd slap her down." - Sublime from "Santeria"
by SanchoStyle June 24, 2004
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2
Just like Don Quixote's sidekick, Sancho Panza, a "Sancho" is a lover that a woman has on the side - in addition to her spouse or significant other.
She sees her Sancho when her husband's out of town.
by Chica-de-Humo January 07, 2004
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The vengeful act of crapping on a lover's chest while they sleep.

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3
Name used by fellow inmates for the guy that is fucking your woman and whom your kids are calling daddy while you are in jail. Most likely the person you think is your best friend or hate the most. Used in a heckling manner.
'Hey Richard, I heard Sancho is with your woman on the outside'.
by cruznsquaw January 17, 2003
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4
Spanish for the person who comes in your back door when you're at work, drinks your beer, watches your TV, and f's your wife.

(s-on-cho)
Watcheley the sancho!(watch out for the sancho)
by Hunk Bergundy August 20, 2007
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5
Babygirl its ok if you gotta man, i can be your sancho on the sneak
by Mz.DeLaCruz August 30, 2003
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6
I agree with all of the above definitions (which are basically the same), but thought it was interesting to note that instead of saying "salut" when someone sneezes, most of the guys I know say "sancho" instead, which I guess means that if you sneeze that means sancho is at your house with your lady.
"achoo!"
"sancho!"

or, it i were to sneeze (being a girl):
"achoo!"
"sancha!"
by katalyst5043 December 03, 2007
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7
A man who has a continuing sexual relationship with a usually married woman who is not his wife and from whom he generally receives material support which comes from her clueless husband.
-see, pimp, man-whore, or jigglow
...and she said, "once my husband leaves to work, I'm calling Sancho. He knows how to fu-k."
-quote taken from the #1 selling book, "Sancho Is The Father Of My Kids"
by Alex January 15, 2004
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