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