An Aussie saying for someone who does stupid shit and is just a dickhead in general. It is used similarly to the word “Shit cunt” which is also an Australian slang.
“Yeah, hes/shes a goose cunt” or “Yeah, he/she was acting like a goose cunt” etc.
A goosebomb is the needle like projectile that commonly falls from a gooses ass, in a full flock during full V-formation. They are light as rain, or can weigh up to 10 lbs.
I had to dodgegoose bombs while my friends were being torn apart by them, as the mother goose flew overhead. The schoolhouse where I saught shelter crumbled underneath the savage poo.