He has a mustache.

It is countable!

Google search by "growth of mustache" site:us shows 127 hits.

What do you think of this?

northwindWhat do you think of this?

That's an extremely low Google count. I took a look. They are all using mustache as an uncountable noun; the analog is hair. So obviously people do treat it as uncountable in very rare cases.

growth of mustache ~ growth of hair

CJ

Question 1
I have thought mustache is countable until now so I'm surprised to know growth of mustache is correct.
What does uncountable mustache mean or what feeling do you have to see uncountable mustache or what's the difference between countable mustache and uncountable mustache?

Question 2
The other example I found is as follows:
#4. a jolly man with sno

I am now the third native speaker who was surprised to read that there were any hits at all using it as an uncountable noun. The examples you found are the rare examples you seek. I would never use it that way.

With #4, I would insert an "a" before "snowy."

northwindWhat does uncountable mustache mean or what feeling do you have to see uncountable mustache or what's the difference between countable mustache and uncountable mustache?

It's the same as hair, as I said above. the growth of mustache is the growth of mustache hair. a mustache is the entire shape formed by many

Woooow!!
How clearl!!
Gocha!!

Thanks, thanks, thanks!!

I have a question on this too...

I hear you on uncountable noun vs countable with mustache. So, can you use beard in the following way...
1. He has beard.
2. He has a beard.
If both forms of BEARD are correct, why?

Would appreciate the help on this...

I hear you on uncountable noun vs countable with mustache. So, can you use beard in the following way-- No.
1. (X) He has beard.
2. He has a beard.

I'm not sure that some of the previous explanations make the situation of the rare uncountability particularly clear, and I'd like to suggest that such occurrences fit better into an idiomatic use of