An instance in which to many people crowd around one blunt, joint, bowl or bong resulting in no one feeling the effects of the smoked substance.
Shit man, sorry but there's already three heads on our joint, I'm not deadheading this zigzag!
by Donboogiequest March 6, 2016
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Slang for LSD(acid), known from the Tool song "Rosetta Stoned" off the 10,000 Days album.
by Candyflipper420 December 18, 2006
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Neo-Deadhead is a term referring to those commonly categorized at Generation Z'ers, but who choose to follow in the path of Deadheads. Neo-Deadheads, having missed the opportunity to be Deadheads, by nearly 40 years, but still follow the path via wearing Grateful Dead Merchandise and living on Haight Street, San Francisco, among other Haight street family members. You can find Neo-Deadheads in any corner of the earth lighting up joints and attempting to sell you acid/mushrooms.
Dude, I just scored some sweet shrooms from a neo-deadhead in the Haight!
by era nova April 29, 2018
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You can spot a modern day dead head in just about any up and coming left wing town such as Boulder or San Francisco who loves the grateful dead but was born years after the death of Jerry Garcia. A modern day dead head is usually in their 20's attending collage. These fools are usally seen wearing tie dye clothing and grateful dead shirts most likely purchased from Walmart or Spencer's. Long curly hair can also be spotted on these creaters as well as dreadlocks or man buns. A modern day dead has will be preaching peace, love, and tolerance but turns out to be the biggest egotistical douchbag ever once you get to know him or her. Don't let me forget that modern day deadheads can smoke more weed than you, do more drugs than you, and drink more than you. Being a grateful dead fan for these folks is more of a fashion statement or fad.
Guy number 1: That dude over there has dreads and is wearing a grateful dead shirt.

Guy number 2: pfft modern day deadheads. I bet he's never even seen the grateful dead. Phish sucks, Jerry's dead. Get a job hippie.
by Cornbread221 July 2, 2019
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Getting a blowjob from a dead animal
Damnnnnn this giraffe gave me deadhead.
by Sjhdjejsb December 1, 2020
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a person who is so used to being drunk or high that they can’t even reach that level anymore.
hey man, i’m a deadhead so when you put me to sleep for surgery you’re going to have to amp up the gas.
by beachycreek April 4, 2023
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When you feel like you are gonna die but your head is the only part that dies and your still alive
by Maddison_maddison January 13, 2021
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