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как об стенку горох stresses
gen.	like talking to a brick wall (Anglophile); like talking to a stone wall; run off like raindrops (At the time her words simply ran off me like raindrops. ArcticFox)
inf.	as well talk to the wind (george serebryakov)
proverb	you might as well talk to a brick wall
как об стенку горохом
saying.	you might as well talk to a brick wall (MichaelBurov); as well talk to the wind (MichaelBurov); like talking to a brick wall (MichaelBurov)

как об стенку горох : 1 phrase in 1 subject

Cliche / convention

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