diu, meaning fuck, lei lou mou, meaning your motherin cantonese, a dialect mainly used in Hong Kong and malaysian chinese. Most of the swearing in china is related to either their mother, or your family bloodline, and comes along with a string of other equally as bad swears.
Ah Chong, after loosing a match in league
"diu lei lou mou!"
it means throwing a grenade while hugging your mother. Signifies one is being very filial to his/her mother.
Hey Nicholas, you KNNBCCB DIU LEI LOU MO!!
A Chinese swear which describes the action of making sex.
(Usually used in anger and offense others.)
Diu hai ! I failed my test again!