A bastardised version of "Fo' sho' nigga", which is a bastardised version of "for sure my nigga", which is a bastardized version of "I completely concur my african-americanbrother"
Term created by inner city youth expressing obvious agreemet, but eradicated from use once it was adopted by mainstreamAmerica as a parody of inner city youths.
White Guy: "I sure could use a beer"
Whiter Guy: "f'shizzle my n'izzle"
Non-white Guy: Rolls eyes