Top Definition
Used to refer to a fan of the Montreal Canadiens hockey team. Since Saku Koivu was the captain and fan favorite for so long the name Saku can refer to a pathetic, pitiful, worthless fan of the shitty Hab's.
Person 1: Why does everyone call you Saku?
Saku: Go Habs Go
Person 1: Dude Saku Koivu doesn't even play for the Habs anymore, he's on the Ducks.
Saku: Go Habs Go
Person 1: I guess I should just call you Quacku from now on... you're pathetic!
by A Jamoke May 26, 2010

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