let have it

let someone have it (with both barrels)

Fig. to strike someone or attack someone verbally. (With both barrels intensifies the phrase; it alludes to firing a double-barreled shotgun.) I really let Tom have it with both barrels. I told him he had better not do that again if he knows what's good for him. Bob was really angry and let John have it—with both barrels.

See also: have, let

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let somebody have it

to attack someone physically or with words When Joe got home late, Ann really let him have it.

See also: have, let