Another interesting round, ASp . Yet it is my modest opinion the definition could do with some further scrutiny.

Though this may not be usance, I don't know.

j) Any frightful or loathsome creature, especially a bat (Thomas Edmondston, A Glossary of the Shetland and Orkney Dialect, 1866) consuelo, ASp

In 1866 on the Shetlands and Orkneys they considered a bat as being especially loathsome?

Because: "Any frightful and loathsome creature", would that not have been enough?
The adding of the bat seems superfluous I mean. (I like bats. To see them around the house at dusk is magic.To look at them close is especial.)

The one who coined the word and definition just added a superfluous and unnecessary personal dislike to it.

That's why I thought this one really a fake definition.