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2.
Something that is very good, when the word "sick" is not enough to describe the thing in question the word Sicktion is used instead.

Pronounced: Sic'Shon
"that shop is pure sicktion", how was your night out?, "it was sicktion man", "this buds sicktion".
by Baab February 27, 2006
 
1.
Combining the words sick and addiction, sicktion is an addiction to a sick, gross, or disgusting thing.
Bobby's booger eating habit is such a sicktion.
by Levi is better than Sean June 17, 2008