maa lun
It’s a super strong curse that means your mom’s butt is the best place for your cock. People use it when they’re really mad or just want to be rude.
My brother said 'maa lun' to my dog when it peed on the couch.
My neighbor said 'maa lun' to my mom when she played loud music at 2 a. m.
I said 'maa lun' to my friend when he forgot my birthday.