Japan times has a short list of otaku (obsessive fangeeks) jargon.
Hesoten — laid-back, secure, happy. Literally means sprawled on one's back with one's belly-button pointing skyward.
Haniwa rukku — High-school girls, particularly in northeast Japan, have taken to wearing sweat pants under their short uniform skirts to discourage the ubiquitous camera peepers. By so doing, they resemble the garments on haniwa, the clay figures placed around prehistoric grave mounds.
Nonai kanojo — literally "brain-inside girlfriend." It means the girl of one's fantasies — a virtual partner who does not actually exist. The opposite would be riaru (real) kanojo.
