cool_rat.gif 

A popular gif circulating the internet portraying an overweight man having forced intercourse with a hopefully dead rat.

Bro, did Jimmy send you cool_rat.gif yet? I've masturbated to that shit at least 5 times today!

cool_rat.gif by Shrektum February 2, 2021

cool_turtle.gif 

Predecessor of cool_rat.gif, this is a gif involving a man somehow capable of fitting his flaccid penis inside of a live turtle, he then proceeds to have forced intercourse with the poor thing as it struggles to get away.

I caught Ethan fucking the turtle again while he was watching cool_turtle.gif on the family laptop!

cool_turtle.gif by Shrektum February 3, 2021

Cool Uncle 

Mark Rober. A uncle who worked at NASA and now makes genius videos on youtube

Frank: Hey, that’s a cool uncle!
Jerry: Yea, he’s Mark Rober!
Frank: Cooooooooooooooool!

Cool Uncle by Dinglederper May 28, 2020

Cool. Cool-cool-cool 

An irony-proof phrase uttered by Abed on Community, denoting that something is so cool, it's "Who's the Boss" cool.

Prof. Sheffield: I have a wonderful idea. Why don't you teach the next class on "Who's the Boss" so that you can share your open mind with everyone in class.
Abed: Cool. Cool-cool-cool.

Cool. Cool-cool-cool by bob beeflips May 10, 2011

cool out 

-to calm down
-relax
-used synonymous with "chill out"

term was used regularly in the 1970s. rarely used presently

yo,my man, cool out son!

cool out by sye June 23, 2005

cool your jets 

It means to slow down, control your excitement (see hold your horses)

Cool your jets, your order will be ready in an hour.

cool your jets by Bob L March 30, 2004

cool story bro 

An appropriate response to a story that went nowhere and/or was completely uninteresting.

"This one time me and my brother were eating sandwiches and he was like 'dude, I hate mustard' and I was like 'yeah.'"
"Cool story bro."

cool story bro by Geneva H February 7, 2009