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
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
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 17, 2003
To smoke a cigarette quickly enough to extend the cherry (lit part) beyond resonable ash-ability.
She hotboxed her smoke so much that the entire cherry fell off when she ashed.
by Imp Teaser November 2, 2011
A Techno-House party in a small room with DJ'S. The people on the dance floor create heat and the walls will begin to sweat, creating a hotbox, sauna like effect.

Or smoking weed in a car, with the windows rolled up:)
loft party hotbox Detroit Techno hotbox Chicago House hotbox
by Detroit Jack December 26, 2011
The act of cuddling with a significant other in a bed or other type of area. You then rip a huge fart and wait a moment, then throw the covers over their face and hold it down, so they are forced to smell the awful stench of your fart.
I hotboxed my gf in bed last night

Dude you're nuts

Yeah, and that's where her knee went.
by Pyro Monkey August 31, 2006
A hotbox is the act of taking a large hit of pot and blowing it up a very good friends vagina in order to get them high without them having to inhale. It is somewhat similar to a shotgun, only there is no danger of the person on the receiving end of the puff coughing.
Hey, hun.. I could really use a hotbox. I didn't wear panties under my dress.
by swishQ May 29, 2011