improficiency
subpalmated
unartful
unmastered
bland
noncoordinated
nonportrayal
dismal
improvisational comedy
candid
underrehearsed
unsatiety
stylelessness
toneless
improvisational theatre
massacre
choreological
easeless
fashionlessness
choreologically
nongraceful
improvised
improvisatorial
unstageable
uncoordinated
unmusical
ad lib
nontalented
pianolessness
reflexless
subfumose
responsible
unworldly
underconditioned
zestless
awkwardly
couldn't carry a note in a bucket
mutton-fisted
undertooled
uncompatible
ad-libbed
inconcinnity
underdanced
underfeatured
disharmoniousness
inharmony
have one's fingers all thumbs