A person who has smoked enough sherm to acquire serious brain damage. This does not take long to happen, and is often characterized by trembling, drooling from a slackly held-open mouth along with a rambling, mostly incoherent pattern of speach.
Oh man, that Reggie, he ain't nothing but a shermhead now; he ain't no damn good for nothing! Alls he is is a twitching drooling fool slinking around in the alleys. He melted his brains real good.
by Rightwild April 12, 2008
alota shermheads out tonight
by 187 on an undercover cop December 13, 2006
that fucker down the street is always dipping his cigarettes in a smelly liquid, hes a damn sherm head
by therict February 10, 2003
by Shazel October 24, 2005