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