on (one's) Pat Malone

Without or not near to anyone else; on one's own; all alone. Australian rhyming slang referring to a ballad about an Irishman called Pat Malone, who suffered numerous misfortunes after emigrating to Australia. Primarily heard in Australia. To be quite honest, after a hectic week of work, I much prefer having a drink on my Pat Malone than being around a bunch of people. Mary's been on her Pat Malone ever since Rupert broke up with her last week.