It is a term people use when someone is being silly. It is normally said with affection to the person being silly. I have absolutely no idea why the saying mentions a goose. maybe because people see geese as being silly. Who knows?
Octavious: "I had seen an octopus fly a kite one day."
Kevin: "Octopus don't fly kites, you silly goose!"
Kevin: "Octopus don't fly kites, you silly goose!"
by OpheliaRedRose May 8, 2013

by shutupsillygooseb March 22, 2021

by TheirDaughter August 11, 2020

by LeopoldStotch911$$ December 27, 2009

y/n: Look im wearing a sexy valtinesday outfit for you.
Your significant other: Yeah, yeah? silly goose.
Your significant other: Yeah, yeah? silly goose.
by sillygoose111 March 9, 2021

One who is very silly and resembles a goose in nature when acting silly. Also the first form of the silly goose evolution chain.
by silly soose November 16, 2018

by Failureisunknown January 20, 2017
