monar faces (a lingering draft since 7/28/04)

emot-o-cats

（´∀｀）　and （　´Д｀　）

These guys are called モナー (monar), and I am assuming the origin of this word comes from 「お前もな」. There's a lot of 2 chan lingo, and 「お前もな」 is just one of them.
Another 2 chan lingo that I know is 厨房 (chu bo), which means kitchen, but it actually means 中坊 (chu bo), a middle school boy (beginner).

A lot of Japanese engineers and otaku's are VERY familiar with these 2 chan lingo.

Try 逝ってよし (itteyoshi) to your fellow Japanese engineer colleague, when you want to criticize someone. (via tokyopia forum)