We found one dictionary that defines the word pin-brained:

General (1 matching dictionary)

1. pin-brained: Wiktionary

Definitions from Wiktionary (pin-brained) ▸ adjective:  stupid; dim-witted ▸ Words similar to pin-brained ▸ Usage examples for pin-brained ▸ Idioms related to pin-brained ▸ Wikipedia articles (New!) ▸ Popular nouns described by pin-brained ▸ Words that often appear near pin-brained ▸ Rhymes of pin-brained ▸ Invented words related to pin-brained