The sound a japanese cat makes. Much like the American 'meow'.

From STEM, an abbreviation short for "Science, Technology, Engineering and Mathematics", a STEMlord is a pejorative term for a particular kind of person who has studied in these areas at university or works in these fields who holds a pretentious, condescending attitude to anyone who has studied in any other fields, particularly the Arts and Humanities. They typically believe themselves to be more "intelligent" and "rational", while generally remaining incredibly ignorant outside of their areas of expertise and having the charisma of a rotting pig's backside.

It's the sound of boredom. It plays when boredom is lurking.

An interjection often used by fangirls or chibi like art to express satisfaction, joy or any gentle happiness.

The most kawaii word from 2010 from a self demotivational and excruciatingly stressing video on youtube called 'Nyan Cat'

From the popular video "Nyan Cat".

Usually used numerous times in comments on YouTube videos, especially on the "Nyan Cat" video.

After the character from K-ON! Azusa Nakano won the saimoe
2010.The campaign made a poster titled "YES WE NYAN" instead of "YES WE CAN"
The word "Can" is replaced by "Nyan"
While "Cant" is turned into "Nyan't"