amnion. the innermost membrane enclosing the developing fetus and which is filled with amniotic fluid; characteristic of reptiles, birds and mammals. See also amniotic. amnion nodosum. a nodular condition of the fetal surface of the amnion, observed in oligohydramnios associated with absence of the kidneys in the fetus.
Clumsy Ninja is a hilariously funny game where you try to train a hapless would-be martial arts ninja. This is a free application for android phones. You can manipulate any part of this poor fellow's body with just a stroke of your finger. The idea is to train him to the point where he is a martial arts expert.
To the owner, this was worse than not doing it at all! And a real embarrassment to any company that came. So a servant was called clumsy or inept by their employer. Today the term means anyone (floors or not) who irritates others by a clumsy word or action.