Slang for a colonoscopy
Source: "5 Ways We're Designing Robots to Be Total Assholes"
Cracked.com
"In the end, it took a team of 35 people to develop a filter to make {the IBM Watson supercomputer to} stop swearing and wipe the Urban Dictionary from his memory to prepare him for his future as 'a diagnostic tool for hospitals.' We can only hope that they missed some profane nugget hiding in a dark recess of his hard drives, which doctors will hilariously discover when Watson starts referring to a colonoscopy procedure as an 'asshole spelunking'."
by Freezing in Chicago December 09, 2013

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