shenanigans

A deceitful confidence trick, or mischief causing discomfort or annoyance.

“I spotted his next shenanigan – saw it coming – and so avoided being fooled.”

Mischievous play, especially by children.

“Shanti and Tom are playing noisily upstairs again. They’re up to their usual shenanigans.”

Deceitful tricks; trickery, games.

“The advertisement said it would cost $50, but they charged me $75 at the register. I declare shenanigans.”