having goon like qualities or sumthing that is amusing or entertaining

Literally everyone, ever. Including the writer of this definition.

A trend of the year 2009 that involved teenagers causing havoc throughout residential streets pushing and punching any living organism such as dogs, cats, children and the elderly.
As the violent acts occurred the teens would belt "GOONAGE! GOONAGE! GOONAGE!" relentlessly.
Martial law was issued and the goonage fad ended far too late after 3 deaths to the elderly, 17 hip replacements and countless numbers of scraped knees, injured pets and tears shed.

the act of being a goon.