know whether one is Arthur or Martha

present singular third person knows whether one is Arthur or Martha · participle present knowing whether one is Arthur or Martha · past knew whether one was Arthur or Martha · participle past known whether one was Arthur or Martha

1. AustraliaNew ZealandcolloquialTo be in a clear state of mind.

   'For an hour or two after he's had that, he doesn't know whether he's Arthur or Martha.'

   2012, Dawn Eagle, Eliza and the Blue Rose, Xlibris Corporation, →ISBN, page 266

   2 more examples

   His impression was that practically everyone at the party had been drinking on the night in question, and 'wouldn't have known whether they were Arthur or Martha.

   2007, Helen Garner, The First Stone: 25th Anniversary Edition, Picador Australia, →ISBN

   The poor little darling had so many mothers; she didn't know whether she was Arthur or Martha!

   2012, Marie-Therese Gould (Stein), Dirt to Scratch and Eggs to Lay: A Journey From Mitchell to Ma’s, Xlibris Corporation, page 241