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1.
An older person (used disrespectfully). Usually an old head is in denial about age.
Look at that old head trying to get a job at McDonalds!
by Ami 06 May 13, 2004
 
2.
(adj.) Someone who is older than you (male)
Used in philly.
That's my oldhead Mike right there.
by nwp June 23, 2005
 
3.
an older gentleman who sips lean smokes dat super loud and has sex with many women often all at one time. a true OG whos wise to boot. also means old pothead
person 1: watdafuck som oldass nigga jus smoked a pound of loud, popped a molly, and fucked my bitch

person 2: old heads got too much swag. lets hate
by ISmokeCrackAllDamnDay December 20, 2013
 
4.
An old person
That old head is crazy!!!
by Sean M. September 10, 2002
 
5.
Older person who has/still does smoke weed, usually comes from the 70's drug era. Uses odd terminology such as; grass or trees, loves smoking joints, and is a very odd to smoke with in general.
Yo Matt's dad is such an old head, he freaks me out when we smoke together.
by joeblowv1 April 22, 2010
 
6.
a person in their late 20's and older that when they smoke weed they take two puffs and theyre done. an older pot head = old head
jimmy and his boy paul were smokin when jimmy's older brother came in took two hits and left jimmy and paul just laughed and said "damn old heads"
by nickyc420do it to it December 31, 2008
 
7.
This is a crusty old hippie that has been hanging around outside of concerts for way too long.
I bet that old head will know where we can score some molly.
by Holdsworth December 10, 2004