someone who has taken a particular liking to sodamy
girl: they're best friends, right?
boy: they're more than that... they're both fannybandits.
one who steals random womens asses and takes them home to use as pillows and/or a sex toys. the blood acts as a lube
guy: are those butt sculptures on your bed? wtf!
other guy: oh, theyre not sculptures, im a fannybandit