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(n.) Someone who collects the latest, coolest, most efficient, and technologically advanced gadgets for their sport, interest, or hobby.
Did you know Jeff can track our hike's distance, route, and elevation gain with his new GPS unit? He is such a gearhead.
by MM June 02, 2004
A mens shampoo available in quart of oil bottles.
Gear Head Shampoo, gearhead shampoo

by RareArtifact November 14, 2008
A person who spends all there time on the xbox 360 playing Gears of war
Your mates a gear head

Me: Stop playing your xbox you gear head

You: No I cant am playing my mates
by Jay Austin September 12, 2007
Someone who smokes/shoots heroin.
TOM: "You gearheads are gonna be clucking real soon...in fact, your cluckin' right now."
SAM: "Just give us the shit and we'll be fine."

by Christophe Graham September 04, 2006
See also rivethead for a more precise definition. In a nutshell, one who listens to industrial mEwzIk (a.k.a. music) and has a look very rarely seen. The most common triats of the gearhead/rivethead include WWII fighter pilor googles/welding goggles, army helmets, anything remotely militarian or camoflauge, large, black, steel-toed boots (used for stomping the enemy or rivetheads, the raver), most anything UV, sometimes utilizing computer parts as accessories, with most anything original and futuristic. The look is, in most common high school cliques, quite new and original.
Stereotyped Hot Topic "Goth": Check out that gearhead. I bet he listens to Nine Inch Nails.
Overhearing Gear/Rivethead: Shut your tube filth pig! Nine Inch Nails is shit! I listen to Apoptygma Berzerk, KMFDM, VNV Nation, ohGr, The Gemini Ritual, :Wumpscut:, Skinny Pu... Why the fuck am I telling you this?! *proceeds to stomp poser goth to death*
by äRK åNJêL December 21, 2004
A person with a significant excitement or fetish in leather clothing and/or accessories. Most commonly applied to a homosexual male. Leather clothing and/or accessories are often referred to as "gear".
Why is he wearing all that leather?? I didn't know he was such a gearhead.
by JovetX June 05, 2009
Someone who is into, collects, or has a fetish for sports gear , sport uniforms, protective gear, etc (scuba gear, SWAT, football uniforms, motorcross gear, hockey pads, lacrosse, soccer, fighter pilot, etc).
Q: "have you ever seen how much sports equipment Jason has in his closet?"
A: "yeah, i know, he is such a gearhead"
by chr|s sedition September 08, 2005