Similar Words to Fuckup:
Bloomer
Blooper
Blunder
Blunderer
Boner
Boo-boo
Botch
Botcher
Bumbler
Bungle
Bungler
Butcher
Flub
Foul-up
Fumbler
Pratfall
Sad Sack
Stumbler
Definitions of Fuckup:
1. Someone who makes mistakes because of incompetence
2. An embarrassing mistake