Avatastic

When something is so fantastic you have to put my name in it

Me: "A word I just made up is in the urban dictionary!!!"
An unimportant side character: "That's so avatastic"

That's a kneeslapper

A phrase coined by a particular person who does theatre is lebanese and is super smart

THAT'S A KNEESLAPPER FOR SURE FOR SURE
*slaps knees wildly with a crazed look in her eyes*