let have it

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Related to let have it: let it go

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 itwith both barrels.
See also: have, let

let (someone) have it

1. To beat, strike, or shoot at someone.
2. To scold or punish.
See also: have, let