We found one dictionary that defines the word be dead from the neck up:

Miscellaneous (1 matching dictionary)

1. be dead from the neck up: Idioms

▸ Words similar to be dead from the neck up ▸ Usage examples for be dead from the neck up ▸ Idioms related to be dead from the neck up ▸ Wikipedia articles (New!) ▸ Words that often appear near be dead from the neck up ▸ Rhymes of be dead from the neck up ▸ Invented words related to be dead from the neck up