In conversational English, people often use the word cuz (or cuzz) to refer to their cousin. Cuzz is mainly used by indiginous, abbo's/aboriginals in australia short for cousin , or used by australians when doing a black impersonation. CUZZ means Cousin (also meaning Friend or Brother). So now you know - CUZZ means "Friend, cousin" - don't thank us. The meaning of CUZZ is: Because.