(idiomatic) Wildly unconventional; bizarre; absurd. / (idiomatic) Of a person's behaviour: greatly inappropriate.

Alternative spelling of off-the-wall

(informal) For an auctioneer to acknowledge non-existent bids, so as to fraudulently drive up the price for the actual competing bidders.

Third-person singular simple present indicative form of bounce off the walls

present participle of bounce off the walls

simple past tense and past participle of bounce off the walls

(idiomatic) To be overly active relative to the enclosed space in which one is.