1. rip up tear into shreds
  2. wrap up arrange or fold as a cover or protection
  3. rope up attach to one another, for safety
  4. rub up a review that refreshes your memory
  5. trip up cause to stumble
  6. trip-up an unintentional but embarrassing blunder
  7. ramp up bolster or strengthen
  8. prop up support by placing against something solid or rigid
  9. crop up appear suddenly or unexpectedly
  10. zip up close with a zipper
  11. rig up erect or construct, especially as a temporary measure
  12. tip-up constructed so as to tip up or out of the way
  13. crap up become obstructed or chocked up
  14. creep up advance stealthily or unnoticed
  15. whip up prepare or cook quickly or hastily
  16. poop the rear part of a ship
  17. rip out burst out with a violent or profane utterance
  18. pipe up utter a shrill cry
  19. ripple a small wave on the surface of a liquid
  20. wipe up to wash or wipe with or as if with a mop