1. To spend an undefined - but inordinate - amount of time going through the links, interests, friends, relationships, photos, profile, etc. of a person on facebook.
2. To Stalk via Facebook
*Please note, falking has neither a negative or positive connotation and it has no reflection on the sanity of the person engaged in the act.
"I falked him all night"
"She came over and we were falking so many random people"
"when I was sick, all i did was falk"
"You can't falk your friends! you have to falk random people you don;t know!"