A situation in which a person engages in a large number of casual sexual relationships in quick succession; (also) literal: one in which a number of people are provided with fewer beds than there are people.
Origin
1970s.
Definition of musical beds in US English:
musical beds
noun
informal
A situation in which a person engages in a large number of casual sexual relationships in quick succession; (also) literal: one in which a number of people are provided with fewer beds than there are people.