Phrasal Verb 'Trade up'
We have 2 phrasal verb definitions related to 'Trade up'.
Buy larger or more expensive items
Example: British wine drinkers have TRADED UP over the last few years from cheap plonk to expensive wines.
Leave your wife or husband and marry someone better looking, richer, etc
Example: She supported him for years while he was struggling, but when he hit the big time he left her and TRADED UP.