The term "most thrashed" implies something that has undergone a lot of rough usage or abuse. There are several synonyms for this phrase, including "most beaten," "most battered," "most abused," "most mistreated," "most maltreated," "most damaged," "most worn out," "most rundown," "most dilapidated," "most depreciated" and "most tattered." These words describe an object or person that has been subjected to harsh treatment, resulting in its current condition. Whether it is a car, a piece of furniture, or a person, the aforementioned synonyms can be used to describe something that has seen better days and has been through a lot of wear and tear.