Facebook Boyfriend
A guy on your Facebook friends list that you add as your boyfriend. Usually a joke put up by a single girl (or single guy). It makes one look like he/she is socially competent enough to actually get a steady man.
Marc is my Facebook boyfriend even though I only view him as a friend, and he is probably sleeping with 12 other girls and is also possibly gay. What a douche. But oh well - at least my parents won't try to force me into an arranged marriage now.