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When something is really awesome, cool, rad, sweet, or killer. Coined by seandavid of Love Begotten.
Sean: Hey James, you heard that new Converge album? it's so siqqq!

kid at a lovebegotten show: Dang did you see Sean do that guitar move that's so siqqq. Let's steal it.
by MarkJohnson123 April 12, 2010