"Old Rosin the Beau" (or "Rosin the Bow") is an American folk song popular in the 19th century, probably of British or Irish origin, first published in Philadelphia during 1838. An earlier version, "Rosin the Bow" (not "Beau") refers to rosin with the bow of a violin, but both cover the same general subject (see below: ). There are many variations of the song(s), and the tune has been re-used in other songs for political campaign jingles, slave songs, comedy songs, or other folk songs.