A methamphetamine addict (see also "tweeker".) Methamphetamine addiction is usually a hopeless condition, in that chronic abuse of the drug causes irrepairable brain and central nervous system damage, the former leading to lack of impulse control, extreme paranoia, extreme lack of empathy and reasoning power. This is due to the drug's destruction of the limbic system in the brain, a condition which seldom is reversible. Most such addicts are extremely paranoid, exhibit flagrant dishonesty and are criminals in one way or another. Most methheads exhibit single-minded behavior (being "stuck"), usually devoted solely to getting their drug of choice, and will commit crimes against loved ones as easily as against strangers. Self-loathing causes serious self-destructive behavior. Lack of sleep, poor nutrition and poor hygiene ages all methheads far beyond their years and life expectancy is short, usually caused by brain, renal and liver damage. Also a hallmark of the addict is severe cystic acne and rotted teeth. Once a methhead starts "slamming" their drug (using hypodermic syringes, usually .5 ml insulin types) they are generally hopeless, and even with long term rehabilitation, will relapse as bad as before or worse. Sex drive among females becomes nil with heavy use, and they use sex as a weapon, lure or means of income, while males will exhibit an abnormal sexual drive for uncommon or taboo sexual acts, although the ability to get and retain an erection is lost. Loved ones of methheads must learn to dissociate from their victimized friends and keep them away, as property theft is a favorite methhead occupation. Use of expensive surveillance equipment is a must (if they even have a house) and crime to them becomes completely justifiable. The recovery rate among methamphetamine addicts is around 20%; the other 80% remain menaces to society. Almost all have criminal records. Other common synonyms: spinner (usually females), tweeker, thwacker, speed freak.
That methhead bitch gave me HepC, stole my gun and wasn't even a good piece of ass!
by Wacko Magnet March 3, 2009
Similar to Crackhead, but with a opposite racial inference since meth use is primarily associated to, but not exclusively to white people.
Hey, Where'd you go last night? I when to my girls house, but I had to drive through the westside on broad, where all the methheads are.
by AB Dan July 18, 2006
Someone who is heavily addicted to meth.
"That meth head sure is tweakin' out!
"Karen is such a MethHead!"
by MizzSoprano June 23, 2018
A person affiliated with meth, or meth production/sale.
Olivia purchased 69 lbs of meth from a methhead
by creasedrainbow June 15, 2015
Someone who is mental , crazy and acts high or on drugs.
"Wow, he's a methhead ."
" Obviously, they're crazy!"
by Cherry Virgoz October 29, 2019
1. (n). A person who does crazy things and goes beyond the limits of normality. This person tends to be extremely wild and destructive. Methhead is always down to blow some money and roll mad blunts. Often is caught pulling gravs and running for the police.

Synonyms: deathwish609, fuck_the_njsp, gravfiend609, thugnastypapa609
2. (adj). The state of being reckless and not giving a fuck
Synonyms: stupid, dumb, retarted
1. Yo, Justin got hella high last night and ran from the cops. He than ran into a tree and got arrested. What a Methhead.

2. Nigga I'm feeling super Methhead right now. Imma tryna to get super fucked up and smoke a bong on top of a car.
by keepinitreal1hundred September 26, 2014
Anyone who does meth in the eyes of police men n women. Anyone who uses and loves meth.
Example: please don’t call us methhead .it hurts our feelings. Ps your not the best person but I am n also a clean and sober meth head.
by Heaven Lii October 1, 2021