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A word used to describe an abject or surface of extreme smoothness or frictionlessness.
"Daym, those stockings are totally Swillis"
by Buddy J June 14, 2003
Hair that is so smooth, it is swillis.
"Dawg, that hair be so swillis. A 10 on the swillis scale!"
by swillisyfriend June 12, 2003