(n): The besieged state of one's asshole the day after a late night visit to White Castle.
"Dude, that case of sliders I ate last night sure was delicious, but today I'm suffering from a serious case of Castle Astle."

"Honey, will you pick me up another box of flushable baby wipes? This Castle Astle just won't go away."
by agentcause February 27, 2009
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