1. foolish, silly, or ridiculous behavior or conduct
Usage: informal; often used in a lighthearted or humorous way
2. the behavior or activities characteristic of a goon; thuggish or violent conduct
Usage: informal; slang

Examples

• The kids were up to their usual goonery, making silly faces and cracking jokes.
• His constant goonery in class finally got him sent to the principal's office.
• The movie was full of slapstick goonery that had the audience laughing.
• We didn't take his antics seriously—it was just harmless goonery.
• The gang's goonery in the neighborhood had residents calling the police.
• She rolled her eyes at his goonery and walked away.