不三不四 (bù sān bù sì) | Meaning: (idiom) dubious; shady; neither one thing nor the other; neither fish nor fowl; nondescript | Chinese Idiom with Pinyin & Origin

out of place · inappropriate · incongruous不伦不类bù lún bù lèi

lower course of a river · low-class · mean and lowly · vulgar · obscene下流xià liú

neither fish nor fowl · resembling nothing on earth非驴非马fēi lu:2 fēi mǎ

shallow · not thorough · superficial半间不界bàn gān bù gà

(idiom) dubious; shady; neither one thing nor the other; neither fish nor fowl; nondescript