回複：我以為老公這個詞是old grandpa的意思

This word was brought in from Hongkong or Taiwan movie in the late 80s. Similar terms were used as:
我們家那口子
愛人
挨千刀的 。。。。。 等等。


What you are talking about "Old Grandpa" "Old Grandma" is:
令尊 （父親）， 令堂 （母親）