Definition of rub-up:
(n) :
The action of rubbing, for example polishing or massaging.
(n) :
The act of bringing old information to the front of one's memory.
(n) :
(Caribbean) A party, especially one that is spontaneous and involves music and dancing.
(n) :
(obsolete) An encounter (with someone).
(n) :
(slang, obsolete) The act of masturbating.