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Used to tell another officer to stop transmitting and change channels, usually to one more secure.
Person one: 10 3, go to uhf secure, over.

Person two: Roger that.
by Solja May 07, 2006
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Jun 5 Word of the Day
A pubic hair piece. A toupee for the pubic area/genitals. In the 1700’s when mercury was used to treat sexually transmitted diseases (Gonorrhea or Syphilis) one of the side effects was the loss of pubic hair. To disguise this condition, that was not cured by mercury, a Merkin was employed.
17th Century setting: Due to his treatment of the "French Pox" (syphilis) with mercury a merkin Gwendolyn used a Merkin to used to hide the side effects of hair loss and not alarm her husband.
by David W. Tuthill December 30, 2005
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2
when a kid could not guard the person in basketball in score on him in took his ankles
Hey, 10-3 BIATCH
by AntKiiDD May 23, 2019
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3
Said when two people say the same sentence simultaneously.

If then one says 103 and the other cannot speak until someone calls him/her by name.

At least that's how it's used in Hungarian.
A: That guy is handsome.
B: Aww how cute!

A: 103!
B: ...
by Jéger Fanni March 09, 2006
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4
The score of the Stratford v. Memorial Varsity Football game, signifying the end of an age and the beginning of the Apocalypse. Often used to mock the uglies, aka Memorial Mustangs.
by The Minority January 04, 2004
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5
to bust on a sandcastle
originated from the native americans
a form of entertainment if the sandcastle falls you automatically win
by my nuts August 12, 2004
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6
Ryan|Eagles. 'nough said.
Did you see Ryan|Eagle's 10.3? Yeah man it definitely ruined Ke$ha
by Kipz May 28, 2010
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