bluffˈer noun

bluff it out

To maintain a show of confidence in a difficult situation

call someone's bluff

To expose or challenge someone's show of strength, confidence, etc

bluff² /bluf/

1. Steep or upright in front
2. Rough and hearty in a good-natured way
3. Outspoken
4. (of the shape of a body) such that, when it moves through air or other fluid, it leaves behind it a large disorderly wake and experiences a large drag, opp to streamlined
5. Blustering, surly (dialect)

1. A high steep bank, esp of a river
2. A clump of trees (Can dialect)

bluffˈly adverb

bluffˈness noun