Wackadoodle is a slang term used to describe someone or something that is strange, eccentric, or crazy. It is composed of two words: 'WEIRDO' and 'NUT'. The term 'WEIRDO' is used to describe someone who is strange or unusual in their behavior or appearance. The term 'NUT' is used to describe someone who is mentally unstable or unbalanced. Together, these two words form the term 'wackadoodle', which is used to describe someone or something that is bizarre or off-the-wall.