A
person who
fucks you out of your plans, makes things go wrong, drains your energy, or uses you for
whatever aspect until you no longer have what they want.
We were going camping until that fuckubus slashed the tires on my
RV.
It turns out, my
wife is quite the fuckubus.
So-and-so is a fuckubus because he used me for a place to
stay.