a term used to describe paying to stay on somebodies couch/sofa (particularly a London term amongst Antipodeans' and South Africans). Generally it is considered (rule of thumb) in recent years to be £5 per night plus helping out with groceries etc).
I hear he is "dossing" at her place
I hope he is paying the usual £5 to doss at your place.
I'm just "dossing" until I find my own place.