keep the wolf from the door
(informal)
勉强度日;糊口to have enough money to avoid going hungry; to stop sb feeling hungry
throw sb to the wolves
弃…于险境而不顾;见死不救to leave sb to be roughly treated or criticized without trying to help or defend them
a wolf in sheeps clothing
披着羊皮的狼a person who seems to be friendly or harmless but is really an enemy