To Keep on 9 means to be aware at all times without getting distracted.
By telling someone to keep on 9 is usually a threat made by posing gang members to inform you that you are in danger.
person 1 : Aye suuwhoop watchu doin in my area
person 2 : What’s it to you slob

person 1 : Your ass better keep on 9 cause im about to pump you full of lead
by ds.at February 6, 2020
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A programming phrase referring to the acronym DRY, or "don't repeat yourself," often used to remind programmers to avoid writing repetitive code and to utilize modularity.
Programmer 1: *writes repetitive code*
Programmer 2: Write some functions, man, come on. Keep it dry.
by Bernhard Riemann December 29, 2020
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1) Doing what society expects of you; being a proper ciizen; acting properly. Using socially acceptable behavior. Another way to say "walk the straight and narrow path"; being a "proper"citizen; straight laced.

2) The alternate name for "Troublemaker", by Weezer, by dumbasses because they only really listen to the chorus.
"Troublemaker" Exerpt, 2nd verse:

I'm growin' out my hair,

I'm movin' up to Cherokee,

I'm gonna be a rockstar,

And you will go ta bed with me,

'Cause I can't work a job,

Like any other slob,

Punchin' in and punchin' out
and suckin-up to "Bob".

Marryin' a bi-otch,

Havin' seven ki-ods,

Givin' up and growin' old,

And hopin' there's a God.

I'm a troublemaker,

Never been a faker.

Doin' things my own way

And never givin' up

I'm a troublemaker,

Not a doubletaker.

I don't have the patience to keep it on the up.
by Tenacious Faulker June 25, 2009
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general phrase of encouragement meaning to stay focused on a particular job or in general.
"you're doing a great job,keep on trucking."
by bungalow bill April 4, 2005
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Keep it lemon is a symbol in a pro clubs team it can also mean calm
by Fjqjqkaz7gevwqjaiqoq March 20, 2022
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Standing guard or on the look out for unwanted eyes
Keep dick there jawnty while I raid my ma’s handbag for some glue money
by Mickybee November 27, 2017
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Slang for a secret. Meaning don't tell anyone.
Can also say 'Keep it dry'.
I just slept with my girlfriend's sister but 'keep that dry'.

My friend saw me watching something embarrassing I told him please 'Keep that dry'.
by YungShalom May 17, 2020
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