When can I use "FYI"?
"FYI" is an abbreviation of the phrase "for your information". "FYI" can be used in a casual situation where you want to abbreviate this phrase and tell someone information, give them advice, or warn them. It is often used in a sarcastic or joking manner. Ex: My cat bites people, FYI, so be careful petting her. Ex: You are a terrible driver, FYI.