It means to insult someone repeatedly (verbally-usually using things about them, yo mama jokes, etc)
Damn Joey, you was straight gunnin on his ass
by Dickiesgirl4u August 4, 2004
When Keyshawn saw the white female guard approaching he began gunning furiously .
by cosMICjester September 30, 2015
Mercilessly revving an internal combustion engine beyond it's sensible limits. (Australian)
No wonder the block disintegrated, he was in second to get past that truck, and then somehow dropped it in reverse, and he was GUNNING the shit out of it at the time.
by Alex From Oz October 4, 2007
"Brad is gunning for Gary."
by dunebat October 18, 2017
Originally used by pilots to alert their wingmen/AWACs that they are in dogfight range and firing their cannon as opposed to their longer-ranged missiles.

Used by young adult males to alert their wingmen that they are breaking away to engage a target female at close range.
John: KAKOW! Hotties at 11 O'Clock... I got the one with the weater hogs...

Jack: When? What the hell are you talking about?!

John: Guns guns guns!

Jack: Dude, where the hell are you going?
by tunnelr@ February 15, 2010
The greatest thing you can bring to show and tell.
"He has a gun!"
"AHHHHH"
by Rina Glass September 20, 2021