The term a female uses when speaking of the person, of the malegender, known since childhood who, is so exciting that at the mere age of five, she instantly feels a sexual attraction.
This occurs when someone only has a vague recollection of a song, and is attempting to sing it, but cannot remember all of the lyrics. As the person attempts to sing the song, they alternate humming, when they have no clue about the lyrics, with mumbling, when they think they can get away with the words they remember. The result is highly obnoxious.
Person 1: The hmm-mmm-mm don't like it, rock the hmm-mmmm, rock the hmmm-mmm.
Person 2: Dude, stop hummumbling the damn thing and put on the mp3.
When you fail at something in life (eg. failing an exam or not getting a job), go home and spend an hour just standing in the shower, propping yourself up against the wall with your eyes on your feet.
Caleb knew the only thing to do after he didnt get prefect was take a failure shower.