Going off of the popular C.S. Lewis series "The Chronicles of Narnia," Chronicles of Gnarlia simply means something that could be deemed gnarly (i.e. crazy, cool, awesome).
Can also just be shortened to "Chronicles."
While snowboarding: "Damn dude! Cork 10? That ish was chronicles!!" (or "chronicles of gnarlia")
by B Kramer January 19, 2008
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