The crew of the ship saw the flag on the bluff.    From LearnThat.org. 

His bluff succeeded in getting him accepted.    From Wordnet, Princeton University. 

A bluff headland.    From Wordnet, Princeton University. 

A bluff but pleasant manner.    From Wordnet, Princeton University. 

If they call our bluff, we're in a lot of trouble.    From Wordnik.com.  [Column Two] Reference

Are there other places like this in bluff country?.    From Wordnik.com.  [Uncategorized Blog Posts] Reference

She was threatening him and he was calling her bluff.    From Wordnik.com.  [The First Five Pages] Reference

If he called the bluff, we would be in trouble again.    From Wordnik.com.  [Question Quest]

She called my bluff and called the police on her radio.    From Wordnik.com.  [Chicagoist] Reference

Now that he called their bluff they are whining about it.    From Wordnik.com.  [Top Stories - Google News] Reference

‘But if he calls your bluff … if it gets released …’.    From Wordnik.com.  [Temptation] Reference

The act of surrendering is powerful because it calls our bluff.    From Wordnik.com.  [The Next Ten Minutes] Reference

"Suppose I call your bluff and ask you to come to India with me?".    From Wordnik.com.  [Flappers and Philosophers] Reference

Eyes that would be forever closed in death if she called his bluff.    From Wordnik.com.  [The Devil Wears Plaid] Reference

Maybe if she called his bluff, he would get cold feet and run away.    From Wordnik.com.  [Texas! Chase]

BLITZER: Well, why don't you call their bluff and see what they say?.    From Wordnik.com.  [CNN Transcript - CNN Late Edition: OPEC Increases Output; Government Shutdown Looms Before Congress; Bush Changes Campaign Style - September 10, 2000] Reference

Brits used to hate the way Americans used the word bluff to mean cliff.    From Wordnik.com.  [Nit-pickers of the world, unite] Reference

Did he call their bluff & lose or was it a strategic move to lose the CC?.    From Wordnik.com.  [Politics.ie] Reference

It is a study of character, a matching of minds, a thing we call bluff, we.    From Wordnik.com.  [White Shadows in the South Seas] Reference

So he called her bluff by assuming the form of another cat: a big black one.    From Wordnik.com.  [Isle of View]

We might be able to call his bluff if he made this particular anecdote up.    From Wordnik.com.  [Latest Articles] Reference