The willfull breaking of Japanese convention rules by one who is not Japanese (a forigner cf. a gaijin)

To sit in some kind of seat while concentrating on texting/chatting on your cell phone and making various small but awkward noises. (e.g. snickering, giggling, huffing, audible but non-understandable words, etc.)

AKA a "flower vase"
A Chinese slang term which often appears in web novels and dramas. An "empty vase" or a "flower vase" is a beautiful person (of either gender) who has no other substance, purpose, or intelligence outside of their appearance (i.e. they have a beautiful outer appearance, but are hollow and empty inside).

Like a vase, they may be chosen to decorate a person's home or life, but can be largely neglected or overlooked, so the term is usually applied to low-maintenance people.

The term is considered a negative insult, and is somewhat similar to the Western concept of a "skin-deep" beauty or a "trophy wife".

A theory stating that if two people are into each other, a big romantic gesture works, but if one person isn't into the other, the same gesture comes off serial killer crazy.

Chronic back pain from carrying this big Dick around

Worse than wrong, being an untestable claim. Originally used by physicist Wolfgang Pauli to criticize pseudoscience even harsher than simple scientific errors:"This is not right. This is not even wrong."