Idiom of the day :- For a song

Usage, examples and definition of the Idiom :-

Felix saw a pretty bird in a pet shop window. ‘How much is that bird ?’ he asked the man in the shop. ‘That would normally cost a lot of money, but you may have it for a song.’ the man replied. You may think that Felix had to sing a song to get the bird, but that’s not true. The idiom for a song simply means for very little money. ‘I bought my bird for a song,’ Felix said later.