Real Dictionary

malpractice
If you accuse someone of malpractice, you are accusing them of breaking the law or the rules of their profession in order to gain some advantage for themselves.

malpractice in American English
injurious or unprofessional treatment or culpable neglect of a patient by a physician or surgeon
noun: failure of a professional person, as a physician or lawyer, to render proper services through reprehensible ignorance or negligence or through criminal intent, esp. when injury or loss follows

malpractice in British English
noun: immoral, illegal, or unethical professional conduct or neglect of professional duty