A declaration that one is not interested in the topic at hand but that one does not have the proper IQ to come up with a more interesting topic.
Amelia: My grandfather died

Zeus: Cool story bro
by Rihanyce May 24, 2010
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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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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
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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 6, 2011
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"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
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you all know the definition to cool story bro, but now there's an addition. If you really don't like the story your friend just told, add on "Hope they make a movie about it"
Story Teller: aw man I went to work the other day and this lady came in with her kid... blah blah blah
You: Cool story bro, hope they make a movie about it!
by kittykat14311 May 5, 2011
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What a douchebag says when (s)he wants to completely disregard a separate party's important and/or drawn-out speech. Contains a similar connotation to "tl;dr" but with an elevated amount of douchefaggottry.
Guy#1: Alright, look. I brought you here to talk about Jess. She keeps telling me that you've been sending her inappropriate texts and aggressively grabbing her ass in the hallway. I know we're friends, but seriously, the two of us are in a relationship. Back off. Respect both of us and give her some space and I won't have to come at you.
Guy#2: cool story, bro
Guy#1: You know what? Fuck you.
by Implying713 July 18, 2011
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