knothole

noun2

1. •
   In a piece of lumber, a void left by a knot in the wood; such holes are often convenient for peering through when they occur in fences.

   • These city-owned parks, regal concrete crowns with acres of parking lots and nary a knothole to peek through, are a definite swing away from the democratic character of the earlier ballparks. — 1987
2. •
   [before a noun] Youth league baseball.

   • But he was worried that a coach of a knothole team might not like the idea and not let me switch-hit. So, my dad went to the coach. — 1976