unprofessional

Unbecoming of a professional; hence inappropriate in the workplace.

unprofessional behavior

Pitarch went just days after the coach, Cesare Prandelli. A little before Christmas, Prandelli had held a press conference in which he had declined to answer questions and instead delivered a speech one minute 57 seconds long in which he accused his players of being unprofessional.

Lacking a profession.

Not relating to professional occupation or employment; nonprofessional.

The barber's lad, it appeared, was about to pass a professional judgment on her own, when he was dictatorially ordered by the fur-shop girl to hold what she called his "mug." The barber's lad, who in his unprofessional capacity was the slave of love, showed gloomy allegiance by returning to the shop, where he could be seen peering over the blind with every appearance of contemplating doing something unprofessional with a razor on his own windpipe.

One who is not a professional.

The guests, on the other hand, are unprofessionals, the mere receivers of service, the others. Such is the frame of interaction or the role definitions and how these roles are played out in the service encounters.