To remove a muck sack by unsticking one's balls from the inside of one's legs. This is generally done by hand or by spreading the legs, and is widely regarded as one of the best feelings in the world.
Person 1: Wow I feel amazing!
Person 2: Why?
Person 1: I just shillacked one of the strongest muck sacks of my life.
Person 2: Why?
Person 1: I just shillacked one of the strongest muck sacks of my life.
by alfbon February 7, 2018
Get the Shillack mug.A derogatory repurposing of the original word ("shellac" usually refers to lac resin which is often melted down to make varnish, or, to the purpose here, a thin varnish containing the lac resin) which is used to characterize someone of thin character; all surface, no substance.
A frequently misheard line in The Beastie Boys' "3-Minute Rule:" "'Cause I'm running things like a shellac motherfucker."
by Jonathan Ryall September 15, 2010
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Get the Shellacking the shellaleigh mug.A severe beating. Oftentimes well deserve. In American politics it happens when the party in power ignores the will of the people or pretends to know how to spend your money better than you do.
My administration really took a shellacking yesterday. Maybe Nancy Pelosi and I didn't communicate our policies clearly enough, or maybe we didn't do enough
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