amateur amateurish artless botched bungling clumsy dabbling defective deficient dilettante dilettantish half-baked half-cocked haphazard hit-and-miss hit-or-miss immature inadept inadequate inapt inattentive incomplete inefficient inept inexpert insufficient lacking mediocre messy pedestrian poor promiscuous sciolistic shallow skill-less slipshod slipshoddy sloppy slovenly sluttish smattering sophomoric superficial thoughtless unapt undeft undexterous undextrous unfacile unintelligent unproficient unskillful untidy wanting