We found one dictionary that defines the word mentally decapitated:

Slang (1 matching dictionary)

1. mentally decapitated: Urban Dictionary

▸ Words similar to mentally decapitated ▸ Usage examples for mentally decapitated ▸ Idioms related to mentally decapitated ▸ Wikipedia articles (New!) ▸ Words that often appear near mentally decapitated ▸ Rhymes of mentally decapitated ▸ Invented words related to mentally decapitated