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gearjammer

Trucker slang for a driver who works the gearshift hard — specifically someone who speeds or drives aggressively, grinding through gears on a big rig.

ˈɡɪɹəmɪɹhistorical202 viewsLast reviewed Jun 29, 2026+ Add a definition
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#1·Apr 28, 2026

Trucker slang for a driver who works the gearshift hard — specifically someone who speeds or drives aggressively, grinding through gears on a big rig. A gearjammer isn't your steady, law-abiding hauler; they're pushing the truck hard, eating up the miles and probably running hot on schedule. The term evokes the mechanical drama of operating a heavy vehicle at speed, all grinding metal and revving engines.

That gearjammer blew past us on the interstate doing at least ninety with a full load on.
Origin: From the trucker and CB radio culture of mid-20th century America, combining 'gear' (the transmission) with 'jammer' (one who jams or works something forcefully). Editorial expansion authored on Slangora.
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#2·Apr 27, 2026

(slang) A speeding trucker.

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