dutty wasteman usually means a person who is a dirty waste of time or usually does nothing with their life . Dutty is used to elaborate the meaning of waste man for people you completely hate.
An example of this is : “yo bruv you heard dat tyrique is a dutty wasteman” “yeah fam he sits doing nothing with himself and no one even likes that twat”
by Clappedkidda October 24, 2017