Off the wall

Meaning

Strange or unexpected.

Usage

Used when describing unconventional ideas.

Origin & History

Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.

Sports referencing balls bouncing off walls unpredictably.

Used since the 1950s in American slang.