There was a thread on here a while ago that someone said in their family a poo that left no evidence of having been done (no 💩 in the toilet no 💩 residue on the paper) was called a Lucky Barry. It had me laughing for days and was swiftly adopted by my family.
Now in the Daily Mail, but called Ghost Poops. Lucky Barry is sooooo much better.
https://www.dailymail.co.uk/femail/article-13477475/ghost-poop-meaning-signs-symptoms.html
But don't get me started on Mucky Larrys