melonhead

noun2

1. •
   (informal, disapproving) A fool or idiot.

   • Uncle Gene turned toward Dad. "Let the melonhead laugh. We'll show him, won't we, pard?" — 1992
2. •
   (US) One of a group of legendary beings, known in parts of Connecticut, Michigan, and Ohio, generally described as small humanoids with bulbous heads who occasionally emerge from hiding-places to attack people.

   • Melonhead stories appear in Michigan and Connecticut, though Ohio’s Peninsula stores are the most persistent — 2026