round the bend

Colloquial British English slang for losing one's sanity.
"She's sending me round the bend!" or "Why'd you throw out a perfectly good steak? Have you gone round the bend?!"
by Gangis May 22, 2008
mugGet the round the bendmug.

'round the bend

UK. One who is mentally imbalanced, eccentric, crazy, etc. Sometimes expressed as "right 'round the bend." An eighties tune, during the second "British Invasion" of music in the U.S., had the lyric, "You send me right 'round, baby, 'right round, like a record baby."
Did you see him talking to that tree? 'Round the bend, he is.
by Rod Brock July 24, 2006
mugGet the 'round the bendmug.

gone round the bend

British slang for someone who is a wacko, slowly losing their mind
Donald Trump thinks he won the election, I think he’s gone round the bend
by BAD ASS ER NURSE January 03, 2021
mugGet the gone round the bendmug.