wolf in sheep's clothing

cry wolf

To raise a false alarm; to constantly warn others about an imagined threat, thereby failing to get assistance when a real threat appears.

have the wolf by the ear

To be in a dangerous situation from which one cannot disengage, but in which one cannot safely remain.

keep the wolf from the door

To ward off poverty or hunger.

wolf down

To consume (food) quickly or greedily, without regard for table manners.

wolf guarding the sheep

Synonym of poacher turned gamekeeper.

wolf in one's stomach

A ravenous hunger; a large appetite.

wolf of Wall Street

(A name for) an aggressive, prominent, and wealthy financier; specifically (derogatory), one who swindles or takes unfair advantage of people.