My grandmother used to say "Aha she said as she waved her wooden leg". She was born in 1915ish, grandfather was in the medical corps and they lived in UK, India and Hong Kong, so heaven knows where she picked it up from

She had lots of phrases like this, if you asked her she'd just tell you that she had always known them - so it can be anyone's guess. She did however, have a great singing voice right up to the time she died aged 90 and knew songs from everywhere, folk, music hall, parlour music, religious stuff, sho songs - she was ace!