An adjective used to express the way that something is usually so unrefined that you always expect it to be that way
Phil: "I eat all my meals with my bare hands!"
Bob: "Crassic Phil"
by ProbablyNotHuman December 23, 2012
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Rock music of any subcategory that is either offensive to listen to or is simply terrible
Nickleback is the most garbage crassic rock to ever play on the radio.
by Jonidcrushfire August 1, 2018
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