Definitions by Rumple Foreskin III

Mershache 

When you smoke some dirt dog weed and you feel tired as fuck. Headaches are also a symptom.

"Damn, I just smoked a blunt of dirt dog, now I got a mershache"

Ronald: Hey man, i just got some if you wanna toke.

Jim: Nah man, ill pass. That shit gives me a mershache.

Mershache by Rumple Foreskin III June 16, 2010