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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Salutation; refers to the artificial horizon indicator on an aircraft instrument panel. Blue represents sky and black represents the ground. If the black side is up, this will not end well. Similar to truckers' salutation of "Keep it between the paint" and satirical theatrical salutation of "Break a leg."
Said to a spouce: "See ya later, honey; keep the blue side up!"
To a friend: "Remember to keep the blue side up!"
by Melody Lawson July 30, 2008
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An African American male trying to impress a e-girl and act tough. Usually has a big nose with twig arms.
Person 1:"You keep on playing, what up?"
Person 2:"Pixel, you need to shut the f*** up"
by steelsss March 5, 2021
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A girl with a large butt. Keeping it up to either keep twerking or for intercourse from behind.
Girl keep that fatty up
by Little Pajaro October 30, 2017
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If said in a cheerful, praising tone, it means "You're doing great, continue the good work!"

If said in a warning tone, it is a threat that means "Stop it right now, or reap the consequences!"

Praise: Wow, you've lost 35 pounds on that diet! Keep it up!

Warning: I have had all I can take of your whining! Do you want a spanking? Keep it up...!
by MistressApril September 6, 2008
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Sarcastic phrase used when one really wants to say something like shove off, fuck off, eat shit, kick rocks, go to hell or simply stop.
Keep it up, we'll see how far that gets you.
by PineappleJuice April 27, 2015
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