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1.
An insult that doesn’t sink in for awhile.
When Jasmine figured out that slow burn comment from the girl at the bar, she was so pissed.

He’s an idiot, you can say any sort of shit to his face and it’ll be a slow burn. He won’t figure it out for days.
by Brett Burkhardt April 27, 2008
 
2.
1. an attraction for someone what is not instant, but grows over time. 2. the process of becoming attracted to someone over a period of time.
Chuck was used to love at first sight, but was experiencing a slow burn since meeting Janice a few weeks ago and was certain she was the ONE!
by daprinceofhiphopsoul February 19, 2010
 
3.
Gradual but inexorable increase in anger, eventually becoming outright rage or fury; what happens as a patient or slow-witted person figures out what has happened and why it is significant. NOT the insult, but the process that the insult (or other upsetting thing) starts in the victim.
"Beware the fury of a patient man" -- Seneca was talking about the consequences of a slow burn here.

At first Ned liked to think his new girlfriend was popular, but as that progressed to flirty, and then to "widely available even when Ned was right there", he began to do a slow burn about it; finding her topless in the kitchen at a party was the last straw.

She did a slow burn over the fact that her roommate borrowed things, didn't return them, gradually assumed she owned them, and finally began to lend them out and give them away herself.

He dented my car and at first it was no big deal; I left a note on his windshield saying we'd figure out what to do about it, but when I didn't hear from him for months, except promises that we'd get in touch real soon, I started to do a slow burn.
by old lang guy December 11, 2008
 
4.
Allowing an event or comment to simmer under your skin until you erupt and flip out
"I did a slow burn in the check out lane while this lowlife was trying to pay with food stamps."
by Walter Pigeon December 11, 2008
 
5.
a fart, typically of the hot, silent kind, which takes a signifigantly longer time to dissipate in a room.
"Better take your time going in that room, I just cut a fart, and it's a slow burn."
by Chance Beardsley November 21, 2012
 
6.
To patiently guide someone thru a series of events or questions over a period of time that will ultimately lead them to incriminate or embarrass themselves. Similar to what a lawyer or police officer does to get someone to confess. Can also be similar to a con but the goal is usually to humiliate the person, not take their money.
I know your wife's sister invited you over while your wife is out of town but I wouldn't go over there if I were you. She might be setting you up for the slow burn.
by TheAmster January 10, 2007
 
7.
To be stolen from slowly and intentionally, to have something valuable taken from you, little by little on the down low.
Dawg - don't get with Tanya - that b**** put my ends on the slow burn!
by zurielseven May 23, 2006