1. Shorthand for Fusion.
2. One who
pwns others.
WHITE GUY: "fusi sucks"
FUSI: Shut up or I'll kill you.
WHITE GUY: "fusi sucks!!"
FUSI: *kills white guy*
WHITE GUY: *bleeding*
FUSI: "Thank you."
Narrator: In this example, we clearly see the 'fusi' 'pwnt' the white guy.