What's the plural form of thrashabilly? Here's the word you're looking for.
Answer
The noun thrashabilly can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be thrashabilly.
However, in more specific contexts, the plural form can also be thrashabillies e.g. in reference to various types of thrashabillies
or a collection of thrashabillies.