Definitions by xKRASHx

flatline 

1. The effect caused after a severe case of insomnia in which you collapse immediately and sleep.

2. Used to describe an extreme measure of sleep. Incidentally this closely relates to the term "you can sleep when you're dead."

I didn't want to go anywhere, I had terrible sleep and when I came home from school I flatlined on the bed.

Person A: Hey where's Adam?
Person B: He got shitfaced and flatlined somewhere in the kitchen.

flatline by xKRASHx August 28, 2010