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