Shadow buzz

An almost instant buzz experienced when consuming a very small amount of alcohol on an empty stomach. As soon as you start getting your groove on it vanishes when you begin to eat.

Dude #1- "Man, I've got a buzz already! (10 minutes later after munching) Well I had a buzz but lost it, toss me another PBR!"

Dude #2- "Dude, you had an shadow buzz."