A common abbreviation for fish
"Look in that pond, there are two fi.s (Pronounced F-I-Dots) They are orange!"
An FI is an an abbreviation for Fucking Idiot. You see these driving on the roads every fucking day. You can also find them in the workplace, in stores, and health clubs, police departments, and yes hospitals too. Most of them are men, but some are women.
That FI cut me off!
1)Five
please see fo, fo mo info.
what's his phone number? fo-fo-fi-fo-fo-fi-fo (445-4454)
fire fighters; fire engine; sound of fire alarm
Dude, what's that siren? I smell smoke... It's the FI-FI!