The definition of a schlump is a sloppy or poorly dressed or stupid person.(noun)
An example of a schlump is someone dressed in clothes too big that are falling off.
Schlump is slang for doing things lazily, in a foolish way or while poorly dressed.(verb)
An example of schlump is to lay around the house all day in your pajamas, not accomplishing any activities.
See schlump in Webster's New World College Dictionary