foozle (?.)
- bad job
- bevue
- bitch up
- bloomer
- blooper
- blow
- blunder
- bobble
- boggle
- bollix
- bonehead play
- boner
- boo-boo
- boob stunt
- boot
- botch
- bungle
- clumsy performance
- drop a brick
- drop the ball
- duff
- dumb trick
- err
- error
- etourderie
- fiasco
- flub
- fluff
- flunk
- fool mistake
- foul up
- foul-up
- fumble
- gaucherie
- goof
- gum up
- hash
- howler
- louse up
- louse-up
- mess
- miscue
- miss
- miss the mark
- mistake
- muck up
- muck-up
- muddle
- muff
- off day
- pratfall
- pull a boner
- sad work
- screamer
- screw up
- screw-up
- slip
- slip up
- stumble
- trip
- washout