Doss can mean a soft option or an easy win, like a job or exam that takes zero effort. It also works as a verb for sleeping somewhere informally, often on a mate’s sofa or even rough for the night. You’ll hear doss about too, meaning to laze around and skive. Very student and post-pub energy.
"That mock exam was a doss, so we bounced early. Missed the last train and ended up dossing at Jay’s, three of us on one sofa."