НЕ ЗНАТЬ, НА КАКОМ СВЕТЕ

• НЕ ЗНАТЬ, НА КАКОМ СВЕТЕ coll

[VP; subj: human; fixed WO]

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⇒ to be in a state of confusion, be unable to think clearly because of having too much work to do, too many cares etc :

- X не знает, на каком он свете ≈ X doesn't know if he is coming or going;

- X doesn't know which end is up (anymore);

- X doesn't know whether he is (standing) on his head or on his heels.