A crush on a FB friend is characterized by the unexplainable urge to revisit the friend's Photos tab repeatedly and checking to see if other friends have written new messages on their Wall. Usually afflicts users who are only somewhat acquainted.
"I've got a Facebook crush on a guy I was going to rent a room from, but in the end we just friended each other."
Now with more than 300,000 definitions, and mentions in Playboy and on CNN, Urban Dictionary has grown into something of a legend.
