Mummer (noun)

1. A person who takes part in a mummery, especially one in a traditional English play or parade.
2. A person who acts in an affected or insincere manner.

Origin:

Late middle english: from old french momer, of unknown origin.

Examples:

1. The mummers dressed up in colorful costumes and paraded through the streets.
2. He was just a mummer, pretending to be something he wasn't.
3. The mummers put on a play every Christmas.
4. He was a mummer, always trying to be the center of attention.
5. The mummer's parade is a traditional event in our town.