I think 'bragging' and 'showing off' are the same. But is 'bluffing' also the same thing? And if 'bragging' and 'showing off' have the same meaning, which one is more commonly used?
Here's the explanations(the similar ones).
Bluff, pretend that your position is stronger than it really is.
e.p. His bluff succeeded in getting him accepted.
Brag, to talk too proudly about what you have done, what you own etc.
e.p. Ben's always bragging about his success with women.
show off, display proudly, act ostentatiously or pretentiously
So when you say someone is showing off/bragging/bluffing, does it means he's actually telling the truth but just too proudly, or he's just telling lies only to make other people admire him?
And which one is more common?