This term can be used, within the company of those you are close with, to in fact, congratulate a bro on a good story.
JLT: And that's how Frodo destroyed the ring
Everyone else: Cool story bro.
by pppoe December 11, 2012
Coolstorybro is most commonly said by 12 year old faggots.

It used to be used on the image board 4chan as a reply to a long, descriptive post.

But now the phrase has been spread around the internets by stupid fucking kids who are trying to be cool.

If you see someone typing this, flame them immediately.
Jim: Hi

Faggot: Coolstorybro

Jim: Oh, so you're copying off the other kids now..

Faggot: Coolstory

Jim: Fucking idiot.
by Vope February 28, 2011
What you say to someone after they have attempted to troll you to hell.
Person A: (A long streak of trolling)
Person B: Coolstory bro.
Person A: WTF does that mean??!!
Person B: Coolstory bro.
Person A: STFU
Person B: Coolstory bro.
by Anon451 November 03, 2009
A phrase used to react to a story, ect. that has little/nothing to do whith the curent subject.
*under a discussion about videogames*
Dude A:Hay guys i just started reading books, that shit is so cash!
Dude B: Cool story bro
by James Adrian AshtonLillybranch August 12, 2009
The phrase a person uses when he/she couldn't possibly care less about what you have to say, yet feels the need to satisfy your "story" with a response. Very commonly received when the person using the phrase feels as if they are superior to you in each and every way, and would like nothing more than to pound your face into the ground.

As made famous by Katie Dalmas.
":M---|---< DUCKMAN! :M-|-< ASIAN DUCKMAN!"

"Cool story bro."
by LJonesy October 05, 2011
"Cool story, bro" is an expression used to actualize the insignificance of stories or statements that are falsely believed to be very significant by the individual that is sharing them. Usually a condescending response to a self-indulgent based monologue, this phrase is often used when the speaker's story is, in acutuality, not very cool at all. If used to positive effectiveness, the person(s) applying this expression may sufficiently help the speaker to realize how insignificant their story and/or statement truly is.
Scenario: Seth brings his surfboard to the beach on a day when the ocean is evidently very flat.

Surfer: "Wow... I wish I would've brought my long board today."

Seth: "I know, man. I checked the surf report this morning, and there were supposed to be some pretty gnarly waves."

Surfer: "Really?.... Cool story bro."
by Frankie Boom Botz July 26, 2011
cool story bro is a saying that someone should say if they are bored, uninterested, or don't care about what another person is saying.

cool story bro has to be the most annoying thing invented either than "i know you are but what am i ?"

csb is the short form, and there is different ways you can say cool story bro . like cool story bro, write a book about it, cool story bro, want a medal ? and cool story bro, no one cares, cool story bro, make it your status, cool story bro, write a status about it .

but who gives a fuck !? because people who say cool story bro are just faggots who think they are cool .
person 1: kay so on the weekend i went over to em's house for a sleepover and we -"
person 2: cool story bro, write a book about it"
by oneamazingmotherfucker July 20, 2011

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