frosh
goof up
incompetency
screw the pooch
banjax
incompetentness
incompetently
displaying incompetence
bungle
disedify
thwart
be riding for a fall
bollocks up
undermaintain
let slide
incompatibilist
faultiness
bungling
tamper
a bad penny always turns up
go back on
ineptly
faultable
blow
backfire
forfeit
underaction
incorruptibility
uncompatibility
sully
bungled
act up
mutilate
misregulate
neglect
feckless
muck up
tired
ask for trouble
inept
venal
bribable
dishonest
purchasable
corruptible
underminable
vitiate
sow dragon's teeth
paralyse
difficulty
trouble
beef
whipping boy
scapegoat
reap the whirlwind
incompactness
refringe
ineffectualness
unreliability
do-or-die
inconsistentness
tainted
errant
tickle the dragon's tail
down the toilet
make matters worse
cack-handedness
take a dive
misrely
fecklessly
imprudentness
misengender
negligency
harm
incompatibilistic
drop the ball
mismeet
misspellable
damnum
make one's bed and lie in it
deperish
destroy
show up
difficultate
go down in flames
inefficiently
bite the big one
sysape
put out a fire
failingness
corruptingly
fritz
unfit