粵典 (words.hk)香港詞
01
其他人食過嘅嘢，或者佢哋餐具掂過嘅食物 (food that has been eaten by others or touched by their cutlery; literally: rear end of saliva)
名詞用例
食人口水尾
sik6 jan4 hau2 seoi2 mei1
to eat someone else's leftovers
02
其他人講過嘅嘢 (something that has been said before)
用例
唔好#執人口水尾，畀啲自己嘅意見。
m4 hou2 zap1 jan4 hau2 seoi2 mei1, bei2 di1 zi6 gei2 ge3 ji3 gin3.
Don't just parrot what others say. Give me your own opinion.