unprofessional
Corinthian
amateur
clumsy
crude
dabbling
defective
deficient
dilettante
dilettantish
faulty
flawed
green
half-assed
half-baked
half-cocked
immature
jackleg
nonprofessional
raw
sciolistic
semiskilled
shallow
smattering
sophomoric
superficial
unaccomplished
unbusinesslike
uncoached
unendowed
unfinished
ungifted
uninitiated
unpolished
unprepared
unprimed
unschooled
unskilled
untalented
untaught
untrained
untutored
anemic
bear-like
career-minded
chocolate-chip
flighty
imperialistic
imprecise
inconclusive
inept
laughable
melodramatic
mid-table
modernistic
romantick
sketchy
slipshod
sourdough
stiff-legged
tentative
unconvincing
unhistoric
unorthodox
unpractical
unskilful
wild-haired
professional