Use of anus during sex; digital penetration of anus;
I found this in Diane Gabaldon's latest book "An Echo in the Bone", p. 121 and had no clue, although one could guess from the context. "He pulled out the finger and guddled her, light and quick, all along the slick deep parts..." in Jamie's effort to bring Clare to orgasm as quickly as possible. Here the word "guddled" is used to describe what was done after removing his finger from her anus, so messy would definitely apply. As always, the author finds wonderful ways to use Scottish slang words one has never heard of.