Definition of queue up:
(v) :
(British, intransitive) To queue (form a line while waiting).
(v) :
(computing, informal, transitive) To enqueue (something): to add (it) to a queue.
(v) :
Misspelling of cue up. [(sports, billiards, snooker, pool) To take aim on the cue ball with the cue in a game of snooker, or billiards, etc.]