cheek

cheek by jowl close together; side by side.

☞ Jowl here is used in the sense 'cheek'; the phrase was originally cheek by cheek.

tongue in cheek: seetongue.

turn the other cheek refrain from retaliating when you have been attacked or insulted.

☞ This expression comes from Matthew 5:39: 'But I say unto you, That ye resist not evil: but whosoever shall smite thee on thy right cheek, turn to him the other also'.