Do a Trump

Someone is "doing a Trump" if they throw an extended and disproportionate hissy fit when they lose. Especially applicable if they're an adult and really should know better. Often accompanied by unfounded accusations of underhand activity supposedly carried out by their opponents, and/or false boasts about being the winner.

Usually the effect of "doing a Trump" is to make them look far worse than simply losing could ever do.

Donnie's just lost at poker and he's been doing a Trump for the last half hour. Hahaha, now he's calling everyone else cheaters and saying he's the real winner!

Yeah I'll play Mario Cart with you, as long as you don't do a Trump like last time, 'k?

fcool

Contraction of "fucking" and "cool". Used for speed in messaging applications, but also to bypass swear filters.

Hey jeff that gif you posted was fcool man