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это дело нешуточное stresses
gen.	it is beyond a joke; it's not just a trifling business; this is no laughing; this is no light matter; that is no trifling matter; it is not a laughing matter; it isn't a laughing matter; it's no laughing matter; it's not a laughing matter
idiom.	it is no laughing matter (Yeldar Azanbayev)