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1.
The Swedish onomatopoeia for the sound a cat makes.

Similar to the english, "meow".
"Sven, did you hear that cat mjau?"
"Ja, Johan, I did!"
by stanpornolover December 05, 2007
 
2.
The best player ever to play CS. Founder of First Love, the team should make it to CAL-M with no problem.
I wish I was as good as Mjau!
by Mjau! February 27, 2003