kvetch

To complain persistently and whiningly.

A chronic, whining complainer.

A nagging complaint.

Person who endlessly whines or complains.

Person who finds fault with anything.

Describing a kvetch or kvetcher.

To whine or complain, often needlessly.

(Yiddish) a constant complainer

express complaints, discontent, displeasure, or unhappiness

(Yiddish) a nagging complaint