The most suitable response one can give to a story that completely wasted ones precious time. Parents, co-workers, and history classes often provoke its usage.
Bobby: So guess what? Nina wrote me up again, because i came to work late the other day.

Kelly: Cool story bro.

*FML why does Bobby think i give two shits about his life??? Please lord have this shift end already! He makes my job REAL RUDE*

Teacher: Agriculture was key to economic progress in the early ages.

Student (shouting): COOL STORY BRO!

Mom: When i was your age i always had my room spotless.

Son: Cool story bro.
by RudeApproved March 10, 2011
Get the Cool story bro mug.
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
Get the Cool story bro mug.
A slightly more "polite" way of saying "I wasn't listening" and/or "I don't care"
Person 1: "bro, you should've seen all the bitches that were hanging off me last night"

Person 2: "cool story, bro"
by TrueHylian July 14, 2021
Get the Cool story, bro mug.
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
Get the cool story bro mug.
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
Get the Cool Story Bro mug.
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
Get the Cool story bro mug.
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
Get the Cool Story Bro mug.