The term 'Metermaid of Song' refers to the character Rita, a four-letter name, who is featured in the song 'Metermaid' by the band The Hold Steady. The song tells the story of Rita, a meter maid who works in the city and is trying to make ends meet. She is described as a hardworking woman who is struggling to make a living and is often taken advantage of by those around her. Despite her struggles, she remains determined and hopeful for a better future.