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ни то ни сё stresses
gen.	ordinary; between hay and grass (по времени); half one thing half another; half and halfer; whity brown; neither one thing nor the other; neither fish nor good red herring; neither fish nor flesh; neither fish; flesh nor fowl; between hay and grass; betwixt and between; grey area; nondescript; neither fish, flesh nor good red herring; epicene creature; neither this nor that (Interex); what-not (о человеке, предмете)
Игорь Миг	neither fish or fowl
idiom.	neither here nor there (Andrey Truhachev); drop out (Yeldar Azanbayev); neither fish nor fowl (Andrey Truhachev)
inf.	wishy-washy (Beloshapkina); half-and-halfer; whity-brown; half and half (Rust71)
proverb	neither fish, nor flesh; neither fish nor flesh; fair to middling; from fair to middling; neither fish, flesh nor fowl; neither hay nor grass
proverb, disappr.	neither one thing nor another (of things; of persons; used as pred.); neither one thing nor another (used as pred.) (of persons) (of things)
slang	drop-out; so-so; neither shit nor Shinola (from the proprietory name of a brand of shoe polish Anglophile)
ни то, ни сё
gen.	middlingly; between hay and grass; betwix and between; flesh nor fowl; flesh nor good red herring; neither fish, flesh nor fowl; neither fish, flesh nor good red herring; gray area (ATet); comsi comsa (Дмитрий_Р)
fig.	neither head nor tail
inf.	neither one thing nor the other (Rust71)
proverb	betwixt and between

ни то, ни сё: 3 phrases in 3 subjects

General	1
Obsolete / dated	1
Proverb	1