describes someone who has nothing better to do [colloquial]
Definitions (粵典–words.hk)
語句
做無聊嘢；做多餘嘅嘢 to do an unnecessary thing; literally: to have nothing to shit after a meal
由將軍澳去屯門買包紙巾？你係咪食飽飯冇屎屙呀？
由将军澳去屯门买包纸巾？你系咪食饱饭冇屎屙呀？
jau4 zoeng1 gwan1 ou3 heoi3 tyun4 mun4 maai5 baau1 zi2 gan1? nei5 hai6 mai6 sik6 baau2 faan6 mou5 si2 o1 aa3? Going to Tuen Mun from Tseung Kwan O just for buying a pack of tissue? Do you have too much time?