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 23, 2010
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 08, 2010
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 01, 2009

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 05, 2010
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
Not a cool story.
(And not necessarily towards your/a "Bro".)
Girl 1: I went the to mall today and...
Girl 2: Cool story bro.
by smmmg June 17, 2016
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