complain, kick, plain, sound off, quetch, kvetch -- (express complaints, discontent, displeasure, or unhappiness; "My mother complains all day"; "She has a lot to kick about")
complain -- (make a formal accusation; bring a formal charge; "The plaintiff's lawyer complained that he defendant had physically abused his client")
Overview of adj complaining
The adj complaining has 1 sense
complaining, complaintive -- (expressing pain or dissatisfaction of resentment; "a complaining boss")