superchery
/ˌsuːpərˈtʃɛri/Definitions
1. noun
A highly exaggerated or insincere display of enthusiasm or excitement.
“The politician’s superchery about the new tax plan convinced many voters, but it was later exposed as a lie.”
2. verb
To exaggerate or pretend to have strong feelings or emotions, especially enthusiasm or excitement.
“She supercheried her way through the sales pitch, but the customers saw right through her.”