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Something that you don't like or is a pain in the ass, except it is worse than a pain in the ass, and is a pain deeper in your ass. "Ayn" is obviously short for anus.
A Day to Remember is a shitty band and their music is a pain in the ayn! I like real metal, not that emo-punk crap.
by M@77 J@M35 June 15, 2011
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