rub up on

verb2

1. •
   (slang) To rub one's body against another person as a form of sexual stimulation or flirting.

   • Others you may flee from immediately because an ugly drunk girl keeps rubbing up on you. — 2007
2. •
   To stimulate, interact, or resonate with.

   • As Overbrook helped him with his coat, Babbitt said, “Nice to rub up on the old days! We must have lunch together, P.D.Q.” — 1922