bad job
balk
barge
be all thumbs
bevue
blooper
blunder
blunder away
blunder into
blunder on
blunder upon
bobble
boggle
bonehead play
boner
boo-boo
botch
breakdown
bumble
bump
bump into
bungle
butcher
capsize
careen
career
chance
clump
clumsy performance
collapse
come a cropper
come across
come up against
comedown
commit a gaffe
confound
crash
cropper
culbute
defect
deflation
deviate
discover
dive
downfall
encounter
err
bloomer
come by
come into
flub
foul-up
fuckup
gait
mistake
pratfall
slip
walk
stumbled
stumbles
stumbling
happen
impediment
lurch
mishap
misstep
setback
wobble
Trumbull
crumble
fumble
grumble
humble
jumble
mumble
rumble
tumble
umbel
umble