Key 

adj.

To touch someone inappropriately for your own amusement, then brush it off as a joke.

References the recent shenanigans of New Zealand's Prime Minister, John Key, in his repeated unwelcome touching of a waitresses.

"That a-hole just yanked my ponytail, then totally keyed me".

Key by Yoiks! April 23, 2015

key 

just perfect... one of those things that would make you a whole lot happier at any given time

a big mack would be key right now

key by mstar June 26, 2003

Key 

Key, real name Kim Kibum, is the main rapper of South Korean boy band, SHINee. He is well known for being an excellent rapper and a fabulous fashionable diva. He is the master of girl group dances and usually dances better than the actual group.

Non-shawol: Why is that dude wearing a pink boa on stage?
Shawol: Because that's Key, and Key is fabulous

Key by SpazzingKpopper January 4, 2014

Key 

Your major crush, one you often mastrbate to their yearbook picture. The key to your heart.

My key is hotter than yours

Key by Hibamaedabae May 6, 2014

key 

integral, very important, required

that clock in your presentation was key

key by Anonymous November 19, 2001

key 

1. A metal device that opens or closes a lock
2. A Set of characters, when entered into a software program, unlocks locked features and removes annoying nag screens and trial limits.
3. to scratch up one's vehicle, using a key to do so.

1: Damn it, where did my keys go
2: Someone have a key for Windows 98?
3: That fucking faggot pissed me off so bad, I'm going to key the shit out of his car later on

key by [c0x0r] November 21, 2004

key 

means killogram. rappas use it when usually referring to coke. since coke is pretty expensice and valuable meassurements are important that why my keys is so important

Biggy "if it wasnt for the rap game/ id probably have a key knee deep in the crack game"

key by PISA December 2, 2004