When something or someone is overwhelmingly exhausting your nerves; a total buzzkill.
Oh my GOD, look at how she being so LOUD... girl, she is SO 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?
Oh I know it brother but I highly doubt you'd be able to tell the difference between the ones who do and the one's who don't.
Hym " 'Some folks need killin' he said but he doesn't thing that the eternal paradise incest cult should just go to heaven immediately. It's funny how to the Christian, death is good for bad people but only because death is bad for bad people but death is bad for good people even though it's good for good people. It's like 'cognitive dissonance²' But he's right! He probably does need to be killed. It would be the only way to get him to stop doing what he's doing. Your kids are (probably) ALSO going to need some killin."
A series of actions that puts the world's hardest workers to shame, it would look similar to Rocky Balboa as the wolf of wall street.
Luke: did you hear Dan worked 80hrs this week?
Gary: that's it?
Luke: HA! The guy also pulled off a triathalon, marathon and an Inca trail marathon this week.
Gary: jeez... that guys killin' it
The highest possible level of satisfaction with life only to be achieved by young white males who often go to parties, have plenty of money, and slay poon on the reg. You only know you're 'Killin' it' when you're plastered, throwin up the Shaka (surfers' hand gesture), and yelling "I'M KILLINNNN ITTTTT"
Friend: "How yah doin pal?"
Matt: "Don't worry about me man, (shotguns a brew) I'M FUCKIN' KILLINNNN ITTTTT!"
Friend to other Friend: "Hey don't bother Matt, he's Killin' it right now.