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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This is the proper phrase for interrupting a boring monologue while simultaneously tripping or smacking the offender.
Unlike "cool story bro," this phrase can instantly end the conversation.
Boring person: "And then I drove my minivan to the pharmacy and I was only five minutes ahead of schedule and..."
Victim: *Smack* "Cool sorry bro"
by KristopherWindsor May 14, 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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Something retards and trolls say, when they didn't like something they read, really want to argue but, just aren't smart enough to do so.

See also TL;DR
cool story bro is just more obnoxious forum chaff from the crap factory and anon daycare center, that is 4chan.
by Lig Na Baste August 14, 2009
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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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