unprofessionalism means behaviour or qualities that are not professional. Lexicurio rates it Sui generis — a strength score of 87 out of 100.
Etymology
From unprofessional + -ism.
noun
- Behaviour or qualities that are not professional.“By the end of January, and well past the scheduled Dec. 16 opening date, Mr. Büchel had departed for good and begun accusing the museum of interference, unprofessionalism and wasting his time.”