The feeling you get the morning after getting extremely stoned the night before. Somewhat of a confused "not all there" feeling, as if you were still stoned but not.
Damn dude, we just smoked an O last night and I have afterburn.

I think I have afterburn, I got so stoned last night and I can't think straight.
by James Rodrickson July 9, 2007
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A joint smoked at the tail end of a dextromethorphan (DXM) drug trip to reintensify the effects
After robotripping at Sesame Place, me and Big Bird lit up an afterburner and watched the sunset melt in the sky 8-}-~
by Stoned Faux July 27, 2018
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A fart that starts quiet then blasts at the end.
Dude - I was at the library, started a quiet fart and thought, what the hell, time to turn on the afterburner.
by RNPS January 5, 2008
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<noun>

1. During sexual intercourse, while assuming the missionary or doggie-style position, the male cums and simultaneously cuts a huge fart while lighting it with a match.
Good for an extra inch or two.
"After Jeremy lit an afterburner, all hell broke loose at the Chi-Alpha Homecoming orgy."
by Clint & Cherise October 28, 2005
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The drowsy, tired, and undermotivated feeling people get after coming off of pot.
We did like ten huge hits each. I got so stoned. But when i came off of it I had such bad afterburn, so I fell asleep.
by thenazz520 September 13, 2007
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Letting out a fart right before you start to pee.
I hit the afterburners right before I pissed.
by Knuck You September 13, 2011
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The fart you have following a good shit.
guy 1: bro i just let off a mean afterburner

guy 2: niceee
by OH FLAMINGO! August 28, 2015
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