What is "tailor's dummy"

Usage examples of "tailor's dummy".

And so is the way you stood there like a goddamned tailor's dummy when I needed backup.

What you see on the plank before you is my tailor's dummy, the one on which my costumes are fitted.

I stood where she had left me, a tailor's dummy waiting to be put away.

Didn't the bloody tailor's dummy have better things to do than poke his ugly nose in other people's desks?

Tug Weldon was as dapper and refreshed after his sleep as a tailor's dummy in a store window.