Same as a lumpkin*, except on a bidet. In essence, getting both ends clean at the same time.

*receiving a blowjob while defecating.
Alex: "So I was cleaning my ass on the bidet when my girlfriend came in and gave me a blowjob."

Pascal: "Oh, so you got a cleanlin?"

Alex: "Yup."
by Alex216546 May 17, 2008
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