Show Off Meaning

(transitive and intransitive, idiomatic) To attract attention to for the purpose of bragging or personal exhibitionism; to demonstrate a skill, talent or property for the purpose of bragging or personal exhibitionism.

Example:   Grocery stores show off their produce by placing the most attractive specimens in front.
  She loves to show off her driving prowess.
  She loves to show off when she gets behind the wheel of a car.
2014 June 29, Adam Sherwin, “UK cinemas ban Google glasses over piracy risk”[1], The Independent:
  If you've just acquired a Google Glass headset for £1,000, don't show it off at the movies. UK cinemas are to ban the headsets over fears that the gadgets can be used to make pirate copies of Hollywood blockbusters.