Meaning

• To exhibit the best attributes of something.

  "Grocery stores show off their produce by placing the most attractive specimens in front."

• 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.

  "She loves to show off her driving prowess."

Meaning

• One who shows off.

  "Quit being such a show-off, before someone gets hurt."