Definition
Clueless, inattentive, or careless.
In Context
- "After he drove with his turn signal on for five miles, I was pretty sure he was out to lunch."
- "Zaphod Beeblebrox, adventurer, ex-hippy, good-timer, (crook? quite possibly), manic self-publicist, terribly bad at personal relationships, often thought to be completely out to lunch."
- "But then along came this biter / And he was so out of touch / So completely self indulgent / Just so out to lunch"