1.a set of useless tits. (any tit that does not produce milk)
3.also used to describe super slow people, or people with no common sense
1.That old ladies tits are about as useless as ninnies on a boar hog.
2.damn, did you see the ninnies on Tyrone
? Homeboy is smugglin' raisins!
3.Those new guys are complete ninnies.