I'll be buggered by a bear - A loud, silly way to show you're amazed. Like when you see y

A loud, silly way to show you're amazed. Like when you see your mom wearing pants inside out.

I'll be buggered by a bear! My mom is wearing pants inside out!

I'll be buggered by a bear! My brother failed math!

I'll be buggered by a bear! My dog ran away!