killin it 

did it very well, you were the best at it,did something extremly good

when I dance I be killin It, I was killin it when I was singin that song
you killed it homie

killin it by Nikki Banks April 25, 2009

killin it 

1.to be doing something very good

"john was killin it all day long in the competition"

2. to do your own thing, in a sorta funny way

1. "john was killin it all day long in the competition"

2. "max is killin it in his overalls"

killin it by alex July 16, 2004

Killin it 

Someone who is doing very well in every facet of life

Why is the wolf killin it so much

Killin it by BRICKO November 21, 2010

Killin it 

To have sex in a hardcore manner.

I walked in on Johny killin it with Kortnee.

Killin it by Mr.Business April 27, 2004

Killin It!

To do something with the best of your ability; to become a legend in the process or to achieve 1337 status whilst performing the said phrase.

B: Hey YO JOE!! What did you wind up doing last night ?

Joe: YO SON, I WAS KILLIN IT!

B: OHHH SHNAP! THATS WHATS UP MY NINJA!

Killin It! by FPSTOM January 19, 2010

Killin' It 

A way of saying someone is really good at dancing or other active motions

Ay yo brah u is killin' it from party rock anthem.

Killin' It by xXPowaXx September 6, 2011

Killin' It 

When someone is on top of their game- when all is going perfect for someone- they killin' it

Janey Doe's live broadcast is so lit!

She killin' it- that's why they call her Janey Doe!

Killin' It by Jane doe 661 December 11, 2018