Adjective
pea-brained (comparative more pea-brained, superlative most pea-brained)
Alternative form of peabrained
The presence of evil, once scented, tends to bring out all that is most irrational and uncontrollable in the public imagination. It is a catalyst for pea-brained theories, gimcrack scholarship, and the credulous cosmologies of hysteria. Michael Chabon
Evolution takes no prisoners. A loathsome philosophy, but hard to argue against. Repulsive, but entirely valid. Otherwise, the Earth would still be populated by giant pea-brained lizards. Tom Holt