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A marijuana cigarette, already rolled. Usually refers to a hoot route.
I have a six pack, a couple pre-rolls and I'm ready to go.
by THE_REGULATOR October 07, 2009
The act of letting your foot off of the break at a red light, rolling forward in anticipation of the light turning green.
"The other light's turning yellow, pre-roll it so you can burn this guy"

"Man, don't pre-roll this light. You're gunna get caught in the middle of the elft turn signal"
by Ackroyd May 14, 2007
To roll a marijuana joint or blunt well before it is time to smoke it.
We prerolled 2 blunts to have at the concert
by mco1515 May 17, 2010