It is when a person is addicted to facebook, has no conscious awareness of surroundings. being on facebook 24/7 always refreshing home page to see if things have change. instant chatting with the person in same room/house. also, checking farms, cities, western, frontier towns games constantly sending requests!!!
"Jenny has a crackbooking problem."
" She has been crackbooking on her iPhone for the last 4 hours."