What does Bangin' for roof mean?

Bangin' for roof meaning in Urban Dictionary

After getting to an innovative new city in which you don´t have spot to remain, rather than planning a hotel, pay a visit to a bar to pick up a nearby complete stranger and now have sex together with them to spend night free-of-charge at their location.This term ended up being made popular in the event "The nude guy" associated with the CBS comedy "the way I came across your mama"