Eat unda sheet - Getting your mouth stuffed with someone else's tongue like i

Getting your mouth stuffed with someone else's tongue like it's a hot dog and you're the bun.

My neighbor said he ate unda sheet and his dog was licking his face like it was a treat.

I ate unda sheet and my tongue felt like it was on fire.

My cousin ate unda sheet and his face turned blue. He looked like a fish.