When a fangirl or fanboy are in more than one fandom, and are fangirling over all of them. Fanvergence isn't too uncommon but is extremely difficult to manage.
"I love The Fault in our Stars, the Mortal Instrument, The Divergent Series, Doctor Who, Harry Potter and..."
"Okay dude, we get it, you're fanvergent,"
Noun \ˈfat-bərg\: A mass of festering food fat mixed with wet wipes and sanitary products found in a sewer system.
"Given we’ve got the biggest sewers and this is the biggest fatberg we’ve encountered, we reckon it has to be the biggest such berg in Britishhistory."