facebook slackard
a person who signs up for facebook but leaves it to gather dust like an old shoe in the closet, only to use it when they need something and then vanish like a fart in the wind
"You had 30 notifications. Why didn't you reply?" "I was busy being invisible."
"I posted about the party. You didn't come. I had to go to the party alone."
"I sent you a message about the meeting. You didn't reply. I got fired."