Fi-Fi

(Australian) Fly In to Fuck It - a FIFO (fly in fly out) worker who only takes jobs in remote work locations to have screw their way through the work camp.

She's taking another job in the mines, she's such a Fi-Fi.

Fi Fi

A small and beautiful creature

Thar Fi Fi sure is amazing

fi-jacked

That thing when your phones data’s not working and it's because you phone is joined some "Log In" WiFi.

Ahh, that's why it's not bloody working Dave, I've been fi-Jacked.

Two-Fi

A racial slur categorizing people of a certain ethnicity African American/black under this umbrella term.

Synonyms:
A black person, n-bomb etc.

Those two-fis is crazy!