無眼屎乾淨盲

[Literization] No gum in my eyes and make it clean
[Meaning] Willing to lose it all in order to give me comfort

Example
My $500 cash was broken by my dog, and feel unhappy while seeing this half cash leave.  Rather to throw it out and don't let me see this broken cash.
我張五百蚊比狗咬爛咗一半，一睇見得番半張就唔開心，不如索性掉咗佢，唔想睇到，“冇眼屎乾淨盲”。

見過鬼就怕黑

[Literization] After seeing a ghost, and becomes afraid of darkness
[Meaning] Once bitten, twice shy

Example
I missed the class for playing TV game and punished by teacher, and will not do it again. Once bitten, twise shy.
上次走堂去打機比老師罰, 下次唔再走堂了. 見過鬼就怕黑.

食飽飯等屎屙

[Literlization] Waiting for shitting after having a meal
[Meaning] Nothing to do

Example
I have been left off, nothing to do but staying at home.
我比人炒咗，係屋企冇野做，食飽飯等屎屙

牛頭唔搭馬咀

[Literlization] A cow's head does not match with a horse's mouth.
[Meanings] The answer is incongruous with the question.

Example
Peter: Do you have you lunch?
John : There is no chair in my room.
Peter: You haven't answered my question / 你都牛頭唔搭馬咀