Light-o'-love
Light-o'-love (līt"o-luv`) , noun
1.
An old tune of a dance, the name of which made it a proverbial expression of levity, especially in love matters. — Shakespeare
Best sing it to the tune of light-o'-love.
2.
Hence: A light or wanton woman; a woman inconstant in love. Called also light-of-love. — Beau. & Fl