冇尾飛砣 (mou5 mei5 fei1 to4) — someone or something that comes and goes, and does not come back/one who is unreliable or does not stick with promises in Cantonese
mouˏ₅冇meiˏ₅尾feiˉ¹飛toˎ₄砣简 冇尾飞砣
Mandarin Pinyin: mao3 wei3 fei1 tuo2
Meaning of 冇尾飛砣
nounsomeone or something that comes and goes, and does not come back/one who is unreliable or does not stick with promises