(fell-UNNi-linGUST-io) - the act of performing oral sex on a hermaphrodite.
When Jay finally got into Terry's pants, he was surprised to find she had a dick and a vagina! Being a closet fag, he was torn between cunnilingus and fellatio, so he did both. Fellunnilingustio!
by Bob Jerunkle March 12, 2013