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5.
One of the ultimate insults and comebacks of the world, along with "So's your face", "That's what she said" and "Ya Mum".

It is said either by the person who insulted you, or a by stander who witnessed the insultation.

Can be used quite effectively with others in the "Ultimate Insult" group.
Trever: Hey do it harder, man!
Donald: That's what ya mum said!
Ben: Oooooooh Burn!
by Nothing But Rock September 05, 2008
 
1.
A a lighthearted response to an insult. Popular on melo, 'That 70's Show' and Adult Swim.
"You're such a dork." "Ohhhhh, burn!"
by Alexia Lovecraft January 26, 2004
 
2.
1. Oh Burn : This is used after you say a good or bad insult.
Ex. Hey Jake Your Mom Is Fat, OH Burn!
by Louie Wray September 17, 2005
 
3.
A vocal utterance that signals anyone more culturally sophisticated than an orangutan to pick you up and throw you off a cliff for the good of all mankind, even when used jokingly. Similar middle school esque blurps include "swag", "yolo", "snap", "gangsta", "raped", and "owned".
Jason: My girlfriend dumped me, but at least I got accepted into UFV

Bryan: Oh burn

Jason: You're 28, uneducated, work at Wal-Mart, live with your mom, and you talk your balls just dropped. You aren't in any position to be "burning" anyone. Ever.
by Duke Space Disco February 01, 2014
 
4.
A witty insult, usually causing friends to snap their forefinger against their thumb and yell, "oh burn".
Hanif said "Hira, your socks smell so bad that your neice almost fainted. Oh Burn!"

NOT: I'm in a meeting. Oh Burn.
by HV911 January 25, 2006