Bravado (noun)

1. An attitude of boldness or daring; a show of courage.
2. A false or insincere display of courage.

Origin:

Mid 17th century: from spanish bravada, from bravar "to brave", from bravo "brave".

Examples:

1. He put on a show of bravado but was actually quite scared.
2. She spoke with bravado but her hands were shaking.
3. His bravado was just a facade to hide his fear.
4. She put on a bravado display to impress her friends.
5. He put on a bravado display to hide his lack of confidence.