Top Definition
When an Ice Hockey Player has a goal, an assist, and a bad stick penalty in one game. Named after Alexander Semin of the Washington Capitals known for his flair for scoring and taking bad stick penalties such as hooking, slashing, and occasionally the high stick.
On April 13, 2011 Alexander Semin of the Washington Capitals scored his first Semin Hat-trick of the 2011 NHL Playoffs.

Wow he's one bad penalty away from scoring a Semin Hat-trick.
by Puddin_an_Semin April 14, 2011

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