A person (usually male) who wrangles poon for a living, likes smalking smike smish, is more likely than not lead harmonica player for a country/punk band.
1. Used as a term deriving from disappointment or boredom; often says as a conversation filler.
2. A form of annoyance to disrupt another's train of thought.
3. Meaning up to personal interpretation; able to be used at any moment.
As my mind blanked on what to write for my essay, it hit me; "Shmoomemoo," I wrote, and confidently handed it in.