Sound used all the time by Everyone
The Russian sound for sarcastic laughter.
Note: It is used primarily on the Internet and in video games.
"Этим ребятам не везется сегодня. Гыгыгыгыгы"
Added by xxbeelkj
* Squirrel tail
Sound used here and there by Native speakers
This is a word that is often used as a humorous "test" for non native speakers learning German/Austrian. It literally means "squirrel tail", but in a very heavy accent, which makes it quite hard to pronounce for someone who isn't a native speaker.
"Oh you're learning German/Austrian? Say Oachkatzlschwoaf!"
Added by anonymous
* sob
Sound used here and there by Young People
It's a sound or weeping/sobbing. Young people utter this word when they feel like crying, either happy or sad.
"宿題マジたくさん出た。ぴえん。” (shukudai maji takusan deta. pien.)
Added by koinusensei