8 Things Only Brooklyn Nine-Nine Fans Will Understand

It's a phrase that conjures up an instant image of Peralta's nervous, worried or otherwise devastated expression. To those uninitiated in the ways of the Nine Nine, it may sound like nothing more than a nervous stammer, but amongst fans it takes on a new meaning, serving as a sort of secret handshake. If you know, you know.

It's almost impossible to resist – all it takes is for someone to use the word once, and it begins, resulting in either a look of confusion from the other party, a laugh, or, on rare occasions, a full-scale competition as to who can keep their cool-cool-cool-cooling up the longest.

Using Jake's catchphrase in everyday life serves as the ultimate nod to the King of the Nine Nine, and it's an excellent way of judging whether you should share your Skyfire Cycle fanfic or not.