What does an op mean in insulting terms

[Awsomebrofist]

Allot of people been insulting people with it

 

[markwp]

"OP" is original poster (thread starter). Why would you think this is an insult?

 

[Pinhedd]

"OP" is original poster (thread starter). Why would you think this is an insult?

My guess is that he's just started hanging around 4chan and is wondering what "OP is a f@##$&*" means

EDIT: In a gaming context it can also mean Overpowered

[Community Manager's Edit: Please do not use the "f" word epithet, even in non-insulting, informative context. Word removed from post. -jpishgar]

 

[manofchalk]

^ Pretty much
4chan and websites like it, its par for the course to insult the OP, so much that it has spawned its own meme. In a typical forum context it usually means the Original Poster or Original Post.