Facebook Boyfriend
A guy on your Facebook friends list you say is your boyfriend. It's usually just a prank. He's not real. He's just a guy you added to make your friends laugh.
I added my gym teacher as my boyfriend. He's got abs and a temper.
My friend put her barista as her boyfriend. He gives her free coffee and bad service.
I made my uncle my boyfriend. He gives me advice and a lot of side-eye.