Foo

I word commonly used in the hispanic american communities in the U.S primarily in southern California. From what we know it to be, it has nothing to do with the word fool. It is used in the substitute of a name and anybody can be called it i.e. your friend, foe, sister, brother, some random guy at a party, etc...

Hey foo! Where you at?

Ohh i know him. He's a bitchass foo!
Ey! When you foos coming through?