鬼拍後尾枕 Back of the head flapped by ghost :
Means "slip of tongue" in Cantonese,
It’s like a person whose back of the head is flapped by a ghost, and accidentally said something that shouldn’t be said.
畫公仔畫出腸 Draw a figure with its gut:
Means "giving too much information to explain something" in Cantonese,
Generally we don't need to draw the gut of a figure, if we do it, there is too much redundant information here.
崩口人忌崩口碗 A bowl with cleft is taboo of a person with harelip
Means "touch the tender spot" in Cantonese.
