The term 'Rude Dude' can be broken down into four crossword solutions: BOOR (4 letters), CHURL (5 letters), CAD (3 letters), and LOUT (4 letters). BOOR is an old-fashioned term for someone who is rude, ill-mannered, and insensitive. CHURL is a synonym for BOOR, referring to someone who is surly and unfriendly. CAD is a slang term for a man who behaves in an immoral or dishonorable way. Lastly, LOUT is another word for a rude, obnoxious, and aggressive person. All of these words are used to describe someone who is rude and disrespectful.