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be off the wall

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be off the wall

To be strange, wacky, or unusual. Her hypothesis is really off the wall, but the facts seem to support it. The millionaire investor is a little off the wall, and you never know what he's going to say in the board meetings.

See also: off, wall

be off the wall

  (informal)

to be strange or very different from other people or things Even at school he was considered off the wall by most of the students. (informal)

See also: off, wall