to nitpick, to split hairs
Você não tem nenhum problema de saúde, o médico já disse, não deveria buscar pelo em ovo!
You don't have any health problems, the doctor already said, you shouldn't nitpick!
The expression buscar pelo em ovo ("to look for hair on an egg") rests on a plain impossibility: an eggshell is smooth and bald, so there is no hair on it to find.
Falando's Idiom Trainer teaches you to recognize idiom meanings and create sentences using them, so you can speak like a Brazilian.
