whoever the person is below me is wrong.
all up in my grill doesn't necessarily mean in someone's business.

it means someones in your face.
grill = face.

therefore, it can also be used describing someone who is excessively annoying and bothering you.
That ho was all up in my grill. Tell him to get his nasty, annoying self outta my face.
by mahal April 21, 2005
Get the all up in my grill mug.
it means sorta like mind ya business. as in stop buggin me. u can use it 2 scold gossipers too. used w/ all up in my business
jen: so what did u & him do last night huh?
tia: geez, all up in ma business all up in ma grill!
by PinHeard March 9, 2004
Get the all up in your grill mug.
An exclamation for those given times when a situation is so intolerable, as every one on the entire planet is pissing you off at any given time, for no apparent reason.
Comes home from shitty day at work, just wants to chill out... discovers house mates left trash all over the place.

"ffs, why is every one Gettin' up in ma grill today!?"
by sabzwin June 6, 2015
Get the Gettin' up in ma grill mug.
all up in my grill means when someone is all up in your business or all up in your body area
guy comes up places hand on girls boob
girl says: oh boy...you are all up in my grill, you better get off
by Stephanie April 27, 2004
Get the all up in my grill mug.
To be all over a person in a sexual fashion.
"Yowanda wants me up all in her grill tonight!"
by Peterson September 7, 2004
Get the all up in your grill mug.
Very similar to "Get up off my nuts", but it can be used by persons of both genders.

Rooting from "Cease and decist" it has been urban-ized and turned into a more popular version.

Exacting meaing is not known, but when it is said, it is advised that one moves up out the "grille" or personal space of the one who said it. Not doing so could lead to the "busting of a cap"
Herbert: "Hey Phillip, get up out my grille a afore I bust a cap in yo ass."

Phillip: I shall cease and decist.
by Craig January 17, 2005
Get the get up out my grille mug.