describes someone who does or says things that totally does not make any sense [colloquial]
Definitions (粵典–words.hk)
形容詞、粗俗
話人將食同屙嘅嘢調轉，意即本末倒置、背棄常理 misplaced or reversed priorities; putting the cart before the horse; literally "to eat faeces and excrete rice"
打機都係為咗玩嗰時開心啫，你打機打到請人幫你打，你話你係咪食屎屙飯吖？
打机都系为咗玩𠮶时开心啫，你打机打到请人帮你打，你话你系咪食屎屙饭吖？
daa2 gei1 dou1 hai6 wai6 zo2 waan2 go2 si4 hoi1 sam1 ze1, nei5 daa2 gei1 daa2 dou3 ceng2 jan4 bong1 nei5 daa2, nei5 waa6 nei5 hai6 mai6 sik6 si2 o1 faan6 aa1? Playing games is all about fun. You are putting the cart before the horse as you hire someone to grind for you in the game.