1 definition by L A D

Top Definition
1. Metamorphic rock
2. Can also be used in place of "gash". Originated from under graduate level geology banter. Standard of Schist is graded from low grade, medium grade to high grade, with an exceptional standard having the pre-fix "foliated".

Mate, that is some high grade foliated schist!

Get that dirty low grade schist out of my face.
by L A D April 16, 2008

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