An acronym standing for “big fucking key chain”. A keychain that has more than 10 pieces is required to be given this name. Usually the owners of these are janitors or douchebags.
Hey Ben, be careful with that BFKC! The weight could damage your iginition you gingerhobbit fuck!
A hardo is a person who tries extremely hard at everything. Most times a hardo will try very hard at things that do not require excessive effort. For example, sports practices, gym class, etc.
Wow did you see Jack at practice today? What a hardo!