(transitive, intransitive) To stimulate the penis or scrotum using the mouth.
At trial, the precise content of the sexual activity which subsequently occurred, as well as the Complainant’s state of consciousness at the material time, were matters of dispute between the Prosecution and the Defence. What was not disputed was that sometime between 4.02am and 5.43am, the Accused fellated the Complainant.
(transitive, by extension) To suck in a manner suggestive of fellatio.
(transitive, figuratively) To suck up to, to flatter or be shamefully subservient to.