This is afrikaans slang meaning a boy or man that is so white it cant be helped. There is no way of stopping it.
John: hey you see boy over there. He is such a (witbooi) it is unbelievable.
Max: i know. I feel sorry for his girlfriend but it cant be helped.
John: his dancing either
Max: i know. I feel sorry for his girlfriend but it cant be helped.
John: his dancing either
by Jane Jordan January 07, 2019