Pseudoword

Ridiculous, nonsensical, or imaginary word made up for the express purpose of impressing someone or being published on Urban Dictionary.

Bill - "Bob, you're such a cougar monkey."

Bob - "Bill, what the hell kind of pseudoword is Cougar Monkey, you just plain sh*t that word from thin air."
Bill - "Dunno, sounded good at the time, sheesh, don't be such a cougar monkey!"

pseudoword

n. a word that is not actually a word; a made up word.

pseudoword is a pseudowor—wait, uh, no, no–I mean, it IS a word it's just not, uh