(adj) lacking professional skill or expertise, Syn. amateur, unskilled, inexpert, Example:a very amateurish job; inexpert but conscientious efforts; an unskilled painting
a. In the style of an amateur; superficial or defective like the work of an amateur. -- Am`a*teur"ish*ly, adv. -- Am`a*teur"ish*ness, n. [ 1913 Webster ]
[しぞくのしょうほう, shizokunoshouhou] (exp) (See 士族) amateurish and haughty way of doing business; venturing into an unfamiliar line of business (and often failing)