Definition of bump up:
(v) :
(transitive, idiomatic) To increase something suddenly.
(v) :
(transitive, idiomatic) To promote a person to a higher grade.
(v) :
(transitive, idiomatic) To give a more prominent place to; to advance position in queue.
(v) :
(intransitive, idiomatic) To bump into something; to collide with something.
(v) :
(intransitive, idiomatic) To figuratively collide with something; to come into conflict over something.