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1. noun. a pain in the ass.
2. noun. an ache generated by sitting too long.
I've been playing Final Fantasy so long I've given myself an assache.
by censored711man December 14, 2004
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Something or someone that provides a constant "pain in the ass". You know, that person or thing that's sure to cause unnecessary or unwarranted grief.
Holy Christ pal, your actions and thoughtlessness have created the mutha of all ass-aches....and now I'll need to clean this up once again!
by Nattyholt1 August 20, 2012
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