"fun"/"gui" hanzi

[Diane]

Hi

I wanted to ask how do you write the hanzi for "fun"/"gui" as in "fun ye"/"gui ye" which have the related meanings of "that stuff/those things" like in the phrase "Mo gong goh di fun ye/gui ye" - Don't say it/those things/that stuff.

-Diane

[Terence]

fun ye ? not know
gui may be gwai2 鬼, intensifier added to the things, usually bad.