Crafty Crab Hat

I believe you are referring to "crab hats" as a type of disposable bib that resembles a hat, often worn while eating crabs or other messy foods in restaurants. They are sometimes referred to as "crab bibs" as well. The term "crafty crab hat" might be a specific or regional name for this type of bib.

Crab hats are designed to protect clothing from getting stained or dirty while eating crabs, shrimp, lobsters, or other similar dishes. They are typically made of plastic or disposable paper materials and feature a neck strap to hold them in place. Crab hats are commonly found in seafood restaurants and crab houses in the USA.