There is significant word play in the film , some of it based on the " pineapple bun " . For example , in slang Cantonese , a " bor lo goi " ( " pineapple cap " ) is a colloquialism for kneecap . The Pancakes , who composed the film 's theme song '' gum gum gum '' ( Cantonese : 咁咁咁 , literally " '' this , this , this '' " ) , was awarded Best Original Film Song in the 24th Hong Kong Film Awards
24th Hong Kong Film Awards
24th Hong Kong Film Awards
McDull, Prince de la Bun