Top Definition
The extremely sexy and gorgeous drummer from Apocalyptica. He is a very talented musician. He hails from Finland (where he also resides) and his birthday is December 31, 1975.

He gives incredible hugs and has a beautiful smile. He's really funny too!
When Mikko Sirén hugged me.... I nearly creamed myself! That is one hell of a drummer. I love Apocalyptica!
by LifeBurns August 06, 2008

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