KEI SI

means i’m dead in zopau! (“im dead” is used to express laughter)
kei= im, si=dead

someone: mama farted in class today and in smelt like eggs

u: HAHAHA KEI SI

na zanglu

means dickhead in zopau

someone: ur ugly
u: NA ZANGLU

mihai

crazy or stupid person

someone: len is a mihai