Its On 

1. A term most often used when declaring war.
2. A term used when Something is about to happen.

1. De'Andre: I heard you was talkin bout me...
Leroy: Yeah, I was...You aint gone do nothin bout, so....
De'Andre: Oh I aint...?! Okay...Its On!!

2. Keisha: You goin to the E-40 concert?
Wanda: Yeah girl, Its On and poppin!!!

Its On by Miss LayDee September 1, 2008

its on 

a term commonly used when, after being served, you serve them back. once this is done, then ITS ON!

A:you just got served!
B:oh its ON
A:hey hey, its not on!
B:oh you better believe its ON!!

its on by Simo December 9, 2004

its on 

1. use it instead of saying goodbye
2. use it when something's about to happen

Me: hey girl lets go to the club tonight
Friend: okay meet me there
Me: alright, its on * click *

Me: theres a fight!
Friend: oh shxt! i gotta see that.. k its on!

its on by xoShawty440 July 27, 2009

its on 

a response to someone sayin they are leavin

P1: Ay dude, we up.
P2: Its on.

its on by Kat R. October 17, 2006

its on like donkey kong

A phrase to denote that it's time to throw down or compete at a high level; something is about to go down. The use of the comical video game character Donkey Kong provides comic relief but the phrase itself has greater or more significance than simply its on.

Many people incorrectly assume the phrase's origins are from various movies in which it is used but term was popularized by rapper Ice Cube when he used the phrase in the song "Now I gotta Wet'cha" off his Predator album in 1992. It is unknown at this time whether Ice Cube was the person that originally coined the phrase.

Friend: Yo dog, I just hooked up like 2 kegs and got all the honies from Alpha Epsilon Omega to come to the party you gotta check this shit there is like 4 girls to every 1 guy!

Me: Snap, Its on like donkey kong, nigga!

its on like donkey kong by BJ Penn July 12, 2006

its on like donkey kong

Used to describe it's on and time to party big time.

Originated by Robert Mori of San Francisco, California 1980's.

Rob would close down his Arcade for the night he would grab a Colt 45 Tall Can slam it and scream its on like Donkey Kong. He would then proceed to go out and get wasted and try to get laid.

its on like donkey kong by Lisa P May 28, 2006

its on like vince vaughn 

The DefCon 1 of party status. Can only be achieved on a weeknight. Pure mischief and utter disregard.

"It's already 11, I gotta work in the morning."
"Let's have another round and then head over to Eau and cut some ass."
"It's on like Vince Vaughn!"

its on like vince vaughn by mikey January 19, 2005