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3. slap against

slap against

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slap against someone or something

[for something] to flap or strike against someone or something. The flag kept slapping against Ed, making it hard for him to remain at attention. The awning slapped against the side of the house.

See also: slap

slap something against someone or something

to flap or strike something onto someone or something. The wind slapped the branch against Walter. The gusts from the storm slapped the shutters against the side of the house.

See also: slap