As a noun:
* The poker player tried to bluff his opponent by betting big.
* The detective knew the suspect was trying to pull a bluff.
* His confident demeanor was just a bluff to hide his insecurity.
As a verb:
* She bluffed her way through the interview, even though she wasn't qualified.
* The general bluffed the enemy into retreating.
* I bluffed my way into the concert by pretending I was on the guest list.
Let me know if you'd like to see more examples!