killin 

when someone is doing something really annoying or stupid, etc....

man quit punchin me, ur killin.
or he was killin with the tests today

killin by africaliberia March 31, 2009

KilliN 

The mastermind behind the DDOS of Supermechs forum site in 2013. Currently he is under another alias in the Supermechs Discord Community. His most favorite game is Battledawn: Earth Arena

Hey Alex, did you hear about KilliN hacking tokens?

No, I am busy brushing my tail.

KilliN by ZeekayEz December 30, 2020

Killin 

Killin is an amazing guy who may come off as mean, but has a very sweet side to him. He'd be willing to lose hours of sleep all for you. He's full of jokes and laughter, and may even love to do stuff like skateboarding. He may not relate to a lot of things but Killin will be there for you no matter what.

You know Killin? He's pretty cool, don't you think?

Killin by _adrianneee_ February 15, 2021

Killin'

Performing very well, especially musically.

Herbie Hancock was killin' at the club last night!

Killin' by Heckafresh February 11, 2006

Killin'

(v) to have everything going your way in a game; or somewhere like a game

People say it all the time in basketball, meaning that the guy is "killin'" the other team.

"you see that game last night?"
"yah, that kis was killin'"

Killin' by Brian October 14, 2004

killin'

a combination word between "kickin it" and "chillin"

later on Im going to be killin'at my crib.

killin' by Nasty nate January 28, 2005

killin, 

a killing person, to be addressed to after one a murder of it, inside a family living room

Killin, I am seeing hence I was knowing him, happy Barb/

killin, by man!? April 18, 2018