An appropriate response to a story that is not believable without proof and no proof was provided.

Somewhat like Pics or it didn't happen.
Person A: I just got 15 headshots in a row when spraying with an M249 in Counter Strike Source without hacks!
Person B: Got a replay for this?
Person A: No, but I swear it happened!
Person B: cool story bro.
by gd1 December 1, 2009
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a troll's last resort, often used when the troll has no other defense to use
i like horror movies. no they suck. your movies suck. my movies kick ass. and my movies kick ass too. cool story bro
by chazm00 May 9, 2010
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A phrase used by awesome men with 7in.+ penis' and meant to be used when women talk about long boring stories when trying to watch football or doing something more important.

Also, used towards men when their annoying.

-Can also be used with "nope sorry" in context.
Girl: "Omg today was the worst day! i spilled coffee on my shirt!"
Guy: "Cool story bro"

Girl:"Stop playing cod and listen to me about my day!"
Guy: nope sorry...but cool story bro.

Girl:"I love you"
Guy:"cool story bro"
by Blueboy7thst November 15, 2011
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meaning

we don't really care, please shutup.

originated at south sydney high school from a certain matthew holiday.

Unless you are him or italian, don't even try to claim it.
cool story bro
by yehmancoolstory December 5, 2010
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Phrase used sarcastically to express a lack of interest in what the other person is saying. Often written on the Internet as, "cool story bro".
Person 1: "I think people who listen to metal are mindless idiots."

Person 2: "Cool story, bro."
by thefoureyedfox October 24, 2008
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A response to a story or piece of information that you find boring, or is too long and you don't want to read it.
One extra note, though. The only proper use of "Cool story, bro" is to say it exactly as it is in the quotes. Any other variation ("Interesting tale, brethren", "Wonderful retelling, sibling") should never be used under any circumstances, and will make you look like a complete failure to everyone who reads it.
Me: Yeah, so I was at the mall eating some corn dog when this guy walks by.

You: Cool story, bro
by Punchrocket Piers July 16, 2009
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A sarcastic way of acting like you give a shit of what the other person has to say. Usually this phrase best pertains to Facebook updates and mundane stories with pretty much no point or purpose.
-Bob: Frosted Flakes are bomb, dude!

-Joe: Cool story, bro!

---

Facebook update:

-John is going to get a bananna at the store

-You: Cool story, bro!
by NeverCaughtSlippinKrew February 25, 2010
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