Chump is a derogatory term for an inept or foolish person. Fortunately, there are plenty of synonyms to use in its place, including blockhead, dunce, fool, idiot, dimwit, nincompoop, simpleton, and imbecile. Other options include nitwit, ignoramus, bonehead, numbskull, moron, dolt, and dork. These words all carry a similar meaning to chump and can be used interchangeably in most situations. It's important to note, however, that these words can come across as insulting and offensive. It's always best to choose your words carefully and avoid using insulting language whenever possible.