Unluck

Unluck generally means unlucky, though isn't said in the same way. It's normally just an outburst.

"Shit, I broke my leg."
"UNLUCK!"

Unluckful

Without luck

My brother was unluckful when he didn't get ice cream for 35 years!

Unlucks

A shortening and informal use of the word unlucky.

When you're about to win a victory royale in fortnite but get sniped by a 12 year old. "Damn man, that's unlucks."

Unluck

Something BiciMaci aka Googlegoggler uses to describe unlocking a new character in the video game League of Legends.

"und dann stand da halt.. Unluck!"