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Phrase(s): *(a)round the bend
1. Fig. crazy; having lost sanity. (*Typically: be ~; go ~.) • I think this job is sending me around the bend. • She sounds like she’s round the bend already. 2. intoxicated from alcohol or drugs. (*Typically: be ~; go ~.) • One more of those, and you’ll be around the bend. • From the glassy look in her eyes, I’d say she is completely round the bend now.
McGrawhill's American Idioms And Phrasal Verbs