1. foolish or silly behavior; nonsense
Usage: informal

Examples

• The teacher had enough of the students’ tomfoolery and sent them to the principal’s office.
• Stop this tomfoolery and get back to work!
• His constant tomfoolery made it difficult to take him seriously.
• The meeting was delayed due to unnecessary tomfoolery from the committee members.
• She dismissed his excuse as pure tomfoolery.
• The children’s tomfoolery in the backyard could be heard from inside the house.