A Rusty Spoon - When you spoon with someone and they end up pooping on you a

When you spoon with someone and they end up pooping on you and it turns into a hard crust that you can’t wash off for weeks.

I spooned with my friend and she pooped on me. Now I have a crust on my back.

My girlfriend pooped on me during rusty spooning. It was legendary.

I spooned with my brother and now I have a crust from his poopy business.