【熟】【喻】煮沒有米的粥，也就是只煮白開水，喻乾不切實際或沒有眉目的事。你實際啲得唔得，專喺度煲冇米粥！（你實際點行不行，專門弄無米之炊！）│呢件事而家仲系煲冇米粥。（這件事現在還沒有盾目。）

describes the act doing something that has no positive outcome or where there is no chance of success; all talk and no trousers; to waste time discussing something that will amount to nothing