The term "mecha musume" was first used for a series of figurines produced by the japanese company Konami. The figures personified old military vehicles, such as tanks and planes, as cute girls. It's not used to refer to a general art style in which the features of historical military warcraft, or more fanciful science fiction mecha designs. The term means, literally, "mecha girls."
"I love this new mecha musume show. Badass military hardware? Uber-moe cute girls? Why not get both at the same time..."
by einhorn303 January 14, 2007
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A person with a large long face, rather like a horse with a musum or food ba on its face. Remember, looooong!!
Here comes musum face
Look at that boys musum
by Leicester Liver February 9, 2005
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The absolutely best JPOP group that has ever existed! Totally cute jgirls that you will splooge your pants watching thier goofy onscreen antics.
by Takaaki April 9, 2003
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Proof that a large segment of the population of Japan needs to turn off their televisions and take a long walk out of doors while thinking carefully about the heritage they will be bestowing upon future generations. The girls/media darlings/masturbatory fantasies who comprise the group are not expected to "sing" or "dance" in the ordinary senses of the words; rather, their relentless appearances on television and radio is meant to deaden the souls of those few individuals who still have one. In the larger scheme of things, Morning Musume helps make a handful of rich people richer while perpetuating, if not exacerbating, the nation's endemic molestation of young girls on crowded trains.
1 - (at the supermarket)

"Morning Musume on the radio AGAIN! I just want to buy some fermented soybeans and pickled ginger shreds in peace! My god , I have to get out of this country!"

2 -

Taro: "Have you seen the cover of the latest Mo-Musu single? The cross-eyed one is so cute and do-able!"

Masahiro: "You really are a depraved fucker, aren't you Taro-kun? Tell you what - the next time you reveal your sickness to me I am going to beat you into a coma with a copy of 'Lolita', wakarimashita ka?"
by Capa Boobarang May 6, 2007
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A group of Japanese "singers" that increase and decrease in number every once a while. The group is most popular amongst primary and secondary girls, also by some sad males who live in their sad own world (aka OTAKU). They cannot sing or dance but together as a group, they try to make things look and sound good.
phew!! You guys sing like Morning Musume!! p-u-k-e
by Whale watcher April 22, 2003
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