Slang for "For sure my nigga". Term was popularized by Big Snoop Dogg(formerly snoop Doggy Dogg). Recognized variations are "For shizzle my nizzle", and "For sheezy my neezy". The way to speak this language is simple. Take the 1st sound of almost any word and the rest of the word replace with 'izzle' or 'eezy'.