To do something frequently.

Derives from local television and radio stations doing their traffic and weather "on the nines"
- Mike, you smoke weed?

- On the nines, man!

I get head on the nines, but for some reason I never have sex.
by Don't Hurt Um October 8, 2009
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Nickname for girls rated 9 out of 10. The word is typically used by dudes lacking self confidence, and therefore would not deserve "10's"
"Make sure you invite those NINES to the potluck tonight and bring your gamefaces"
by Nipples Gurunt December 12, 2008
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A nine is nine grams of cocaine. someone who was addicted would buy that much and do it all day, and not have any left by the next day (if they slept at all).
"i get a nine in the morning, by the night it's just plastic"
by Ben Killian April 30, 2007
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A firearm, usually a semi-automatic pistol, chambered for the 9x19mm parabellum cartridge.
Glock 17, Glock 18, Glock 19, Beretta 92F, FN Browning Hi-Power
by Spock July 13, 2003
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A low income slang reference to a semi-automatic pistol chambered in nine millimeter bullets capable of pricing level 2 armor. The slang originates in low-income neighborhoods or ghettos around the US in cities such as Edina, Chicago, New York, Worchester and others. It is called this because there is often violence within these neighborhoods especially gun violence with the most common weapon being the nine millimeter semi-automatic pistol.
"Calm down Jamal, don't pull out "The Nine"

"Rocko says he got a Nine"
by BigBallsHentai89 December 8, 2020
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