“Lunch? You gotta be kidding. Lunch is for wimps.”

“Nobody got murdered before lunch. But nobody. People weren't up to it. You needed a good lunch to get both the blood-sugar and blood-lust levels up.”

“When people you greatly admire appear to be thinking deep thoughts, they probably are thinking about lunch.”

“A computer chatted to itself in alarm as it noticed an airlock open and close itself for no apparent reason.This was because Reason was in fact out to lunch.”

“Money never sleeps, pal”

“Same as you, Arthur. I hitched a ride. After all, with a degree in maths and another in astrophysics it was either that or back to the dole queue on Monday. Sorry I missed the Wednesday lunch date, but I was in a black hole all morning.”

“Zaphod Beeblebrox, adventurer, ex-hippie, good-timer (crook? quite possibly), manic self-publicist, terribly bad at personal relationships, often thought to be completely out to lunch.”