From Longman Dictionary of Contemporary Englishfor a songfor a songCHEAPvery cheaply He bought the house for a song five years ago. → song
Examples from the Corpus
for a song• One woman nabbed an armful of career clothes for a song.• One woman bought a whole armful of clothes for a song.• We buy Third World commodities for a song.• Peter Allen accompanies himself on the piano for a song.• Sometimes I draw on them for subjects for songs.• Some one had an extra ticket for Song and Dance and wanted to know if I was free, a week ago Thursday.• If they are exclusively narrative they are useless for song writing. 