When someone tells you something and you simply don't care.
Person 1: Man, I don't feel like living anymore. My grandpa died yesterday.

Person 2: Cool story bro.
by Thatbrodude August 3, 2016
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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
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a sentence, statement, word or story that went nowhere and/or was completely uninteresting.
1. Oi Raelene, cool story bro, want a sticker for that?
2. Oi Raelene, cool story bro, needs more dragons and shit!
3. Oi Raelene, put a bookmark in your cool story and continue from no one gives a fuck
4. Oi Raelene, cool story bro, thought it was fucking amazing myself
by korean keyboard warrior July 23, 2011
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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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