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4.
A verb in which someone is "Jay'ing" it up.

This means they constantly undermine your ideas, statements, actions, etc.

When someone is Jay'ing it up there is a possibility that the are being a total douche or sarcastically supporting your ideas. If someone is Jay'ing it up, call them out on it.
Guy 1: I think we should go to the swimming pool today.

Guy 2: Thats a gay idea bro

Guy 1: Stop Jay'ing it up!
by AnonymousUser15819 April 05, 2013
 
1.
1. To jerk off, wack off and or wack your bag.

2. To cum, jizz or nut on or about somthing.
1. The other day i was jaying at the computer and my roommate walked in.

2. I was fuckin her from behind and decided to jay all over her back.

3. I was fuckin that chick and her pussy smelt so bad that i lost my hard and couldnt jay.
by Patty Flems August 11, 2008
 
2.
To Dodge a challenge in any form.
me: wanna play some yugioh?
you: naw.
me: why you jaying bro.
by ygo group August 08, 2011
 
3.
Ball and ass sweat that is bad
1: I'm jaying so hard it looks like I've wet my pants.
2: it feels like I shit my pants I'm jaying so bad.
by Itsmecookie July 21, 2013
 
5.
1. The action most perform by Jay.
2. Posting at a mad, insane rate.
"That _______ person has been Jaying lately."
"Yeah, he got a lot of posts yesterday."
by zak July 06, 2004