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.
"Oh man, I spent 2 hours falking this chick from high school last night."
"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!"