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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The act in which the inside of your anus feels pumped up and invigorated, normally right before a massive shit.
I have such an assache this morning...
by Shorty Long Dick May 26, 2020
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