Insta-Drunk 

When one becomes drunk in 2.5 seconds.

Shit man...I am insta-drunk. I just downed four long islands and a car bomb in 20 minutes.

Insta-Drunk by Cheris May 3, 2006

instacrunk 

Instant Crazy Drunk. When you drink a lot of booze in a little amount of time so that you get MAJOR CRUNK INSTANTLY.

David got INSTACRUNK with Amy and they took their friendship one step further.

instacrunk by Rice U December 7, 2005