1. unprofessional - Noun
2. unprofessional - Adjective
not characteristic of or befitting a profession or one engaged in a profession
Source: WordNetdescribed in unprofessional language so that high school students could understand it Source: Internet
was censured for unprofessional conduct Source: Internet
unprofessional repairs Source: Internet
After this, Darwin and Withering became increasingly estranged, and eventually a horrendous argument broke out apparently resulting from Darwin having accused Withering of unprofessional behaviour by effectively poaching patients. Source: Internet
Also, that the union’s unprofessional conduct has necessitated the mobilisation of financial resources, at a huge cost, into necessary but unanticipated expenditure in legal and associated costs. Source: Internet
By extension, the term yellow journalism is used today as a pejorative to decry any journalism that treats news in an unprofessional or unethical fashion. Source: Internet