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1.
A typical response to a dumb or pointless anecdote among friends.
Dude: So, today I was driving home from work and I noticed a streetlight was out.

Kid: ...Cool story.
by Little Nerd June 08, 2006
 
2.
Not a cool story.
COOL STORY BRAHHHHHHH!
by THE COOLEST STORY August 05, 2010
 
3.
when someone says something really weird. akward, or something no one cares, about, so you say cool story to be sarcastic and show that you didn't care.
"So I got buger king the other day cause my mom had a coupon for free whopper, buy one meal get one free. so I got my food and took it out to the truck. well I was driving and I wanted a drink of my coke. so I tore open one end of the straw paper and blew into that. And the paper shot off to the passenger side vent! Then I laughed and forgot about it" - Daniel

"Cool story" - Bri
by supbro!?! February 13, 2010
 
4.
When cool story bro became massively overused people find a way to make it less cliche.
A: Me and my wife have been married for 5 years.... blah blah crap.

B: Cool story bro.

C: ^^ You're really cheesy, just say cool story.
by flyfloon^ August 22, 2011