The fiery sensation you feel on your anus after taking a potent shit; usually occurs after eating some sort of exotic food.
Deezam son, this afterburn is killing me. I shouldn't have eaten those burritos.
by the $cuN>| April 15, 2007
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the remaining used herb, after you have vaporized it. Depending on the type of weed, this can be anywhere from black to a lighter shade of brown. The chances are if you're a stoner, you save this and use it in another way.
Tony: What do you do with your afterburn?
Gabe: I save it and smoke it. What do you do with it?
Tony: I use it to make cannabutter.
by StrungOut532 January 13, 2010
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An Afterburn is commonly linked to a pain in the anus. Often the pain will appear randomly and without warning! The majority of sufferers have had previous experiences of extreme shitting and pregnant-like stomach cramps
ahh mate....my bum hurts and i dont know why!?
that could be the afterburn of you extreme shitting and pregnant-like stomach cramps!
by Dr. johnston E.D M.B.R.R October 29, 2007
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A "burn" off of a intial "burn".
"Hey i found this awesome website urbandictionary"
"Your mom's an urbandictionary"
"You wish that way you could be on her all the time"
"Ah dude great afterburn"
by Sam Bastahdson May 19, 2009
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This is a term I came up with when smoking pot.
When you are the last guy to hit the pipe and all the weed has been smoked and you are hitting ashes. The smoke you get is afterburn.
by Whiskerbiscuit1965 March 19, 2010
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1. A hot, often painful dump that follows a meal of spicy food.

2. A hot, slow and often smelly fart that follows a meal of spicy food.
Man, that pepperoni and jalapeno pizza was good last night but the afterburner damn sure kicked in this morning!
by For Whom the Bell Trolls November 09, 2006
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When someone's just been high from the effects of marijuana, and they're still coming down, they're said to be "afterburning."
Person 1: "Dude, are you okay?"
Person 2: "Yeah man, I'm just afterburning."
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