Okay, anyone who thinks a “Hotbox” has anything remotely to do with smoking…is dead wrong. Its not smoking in your car, its not smoking in your restroom…heck, it has nothing to do with smoking anything, at all. The term has been around since the 1880s, and here is what it truly means:

A hot box is the term used when an axle bearing overheats inside a railroad car’s Journal Box. The Journal is a cast to the truck frame box in which the axle bearings were housed in. It used oil-soaked rags or cotton packing to reduce the friction of the axle against the truck frame. When the oil leaked or dried out, the bearings overheated often starting a fire or melting and locking up the wheel, causing a derailment or burning the train car if not detected early enough.

That…is a HOTBOX
"Ah blow the air, I see that boxcar's gotten a hotbox again."

"Look at that trail of smoke coming from the locomotive, looks like she has a hotbox"

"I told yah to oil the bearings...now we have a hotbox!
by realityrailroad November 27, 2010

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Top Definition
A hotbox is an air-tight room or vehicle that contains one or more pot-smokers smoking one or more joints. The exhaled smoke and the smoke coming from the joint, unable to escape, circulates and thus is breathed in and is not wasted. Smokers in a hotbox may find themselves totally fucked beyond the point of speech after about 30 minutes. Hotboxing is an event that requires some amount of planning, but ensures optimal weed usage.
Guy 1: "Dude, my parents are on hliday and we're gonna hotbox my bathroom!!"
Guy 2: "SWEEET!"
by Rep August 24, 2004

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a sealed car with marijuana smoke in it; stay in a hot box to get more high
ey man, lets get messed up tonight, lets hot box your car!
by suj March 21, 2003

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when u smoke in an enclosed area so that it holds all the smoke
shit all we have is one j....so lets just hot box in phipps car and get high off those fumes
by brad p. nigga May 06, 2005

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When you smoke in an enclosed area(Car, SAUNA, Tent, small room) and the smoke stays in the area and you are contnuously breathing in smoke... the purpose is to FUCK YOU UP! Have fun.
Smoke a blunt with all the windows up!
by Mike Lancea August 29, 2005

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smoking marijuana in a vehicle or room until it is filled with smoke.
we smoked a blunt in the S500, it was hotboxed in 5 minutes.
by lex February 13, 2003

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To smoke out a closed area.
Lets hot box that bathroom dawg!
by Jeff May 27, 2003

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To seal off a room or vehicle so no smoke escapes while enjoying marklar. Not neccessarily the state of the room once it is filled with said smoke. Once smoke has filled the space it is simply said to be "smokey in here"
"Wanna hotbox?" *rolls up window*
by eson December 16, 2003

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