Its a cross between Facebooking and cupcaking (being sweet on a someone you're interested. Esp, members of the opposite sex)
You over there Cakebooking all day on the internet when you should go outside and meet real people.
1) A very late brunch.
2) When one will eat breakfast stuffs and foods way past lunch time.
3) One who has missed the morning food call because they've ran late or what have you.
This brunch was so late we should have called it a "Dunch"!