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1.
An act of pure, unadulterated stupidity, where the goon in question runs the risk of losing social acceptance
Hetherington, this is another example of your goonery!
by The Goonid August 03, 2010
 
2.
Random criminal acts or acts of stupidity commited by otherwise productive members of society for the sole purpose of looking cool, or hoping to relate to a studio gangstas or real gangsta who happen to rap.
Ex.1

"Those damn kids were around here committing all manner of goonery."

Ex. 2

"real talk my nigga!! that goonery shit ain't whuts happnin'!!!"

-tru blu
by Mr. Reality Music April 09, 2008