A song that sounds really good the first few times you hear it, and after that it just gets annoying. Similar to the classic one-hit wonder.
Bob: *listens to music* "Gah! I hate this song! It used to be so good!"
Steve: "Aww dude, sounds like you have a one-hit bummer
Someone who sits on a public toilet seat without creating a “nest” out of toilet paper to protect themselves from germs. Bare Bummers reject nesting on toilets and prefer to expose themselves to germs.
That guy is a bare bummer, when he uses a public washroom he doesn’t nest!