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An anus that is extremely tight and grips any object inserted into it.
My mistresses ass is sphinctacular compared to my wife's gape.
by Woodbilly July 17, 2012
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A major league fuck-up of epic proportions. Something so glaringly shitty, it could only have popped out of a giant, smelly asshole. Very close to craptastic in meaning, though of a stronger nature.
"Well George, this war has certainly become a sphinctacular success. Helluva job, old boy!"
by Iggy Pup May 16, 2007
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