fat finger fuck up

The act of accidentally hitting a the wrong button, or spelling the wrong word, particularly on a smart phone.

"I meant to hit the correct answer in Trivia Crack, but I had a fat finger fuck up."

fat fuck it up

A fat fuck it up is a fat person that fucks up any & everything they touch & eat.

Kiemora: “Jahshawn is really a fat fuck it up”
Trinity: “I know girl he big asf”