三不

the three no's (abbreviated catchphrase)

three / 3

no; not so / (bound form) not; un-

dubious / shady / neither one thing nor the other / neither fish nor fowl / nondescript

of undetermined status / unregulated

the three imperishables, three ways to distinguish oneself that aren't forgotten by history: through one's virtue 立德[li4 de2], one's service 立功[li4 gong1] and one's writings 立言[li4 yan2] (from the Zuo Zhuan 左傳|左传[Zuo3 Zhuan4])

air ball (basketball)

to know nothing about the beginning, the middle or the end / to know nothing at all

scatter-brained / thoughtless

lit. to reply "don't know" whatever the question (idiom) / fig. absolutely no idea of what's going on / complete ignorance

(Tw) from time to time / frequently