Na-adjective (keiyodoshi), Noun
inarticulate; clumsy with words; poor at speaking
彼は口下手で、お世辞にも要領がいいとは言えませんが、それだけかえって私は彼が好きなのです。He may be a poor talker and far from shrewd, but I like him all the better for that.
Also written 口べた【くちべた】
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