From Longman Dictionary of Contemporary Englishbe/go round the bendbe/go round the bendBritish English spokenCRAZY to be or become crazy I sometimes feel I’m going round the bend looking after young children all day. → bend
Examples from the Corpus
be/go round the bend• But if you are going round the bend and resist seeking any help you are deemed to be perfectly okay.• I go round the bend just looking after kids all day.• If you are known to be seeing a shrink you are deemed to be going round the bend. 