f'shixxle
Certain. A messed-up way of saying F'sho. It's like when you're so sure you're right, you don't even care about spelling.
I'm gonna win this game. F'shixxle I'm gonna win it big.
He said he'd help me. F'shixxle he'll help me or I'll kill him.
This is the best day ever. F'shixxle it's the best day ever.