Is  ever used in the Chinese language? And what does it mean? Here's 汉典's rendition of :

 according to 四川方言词语考释 dictionary means 板着(脸).
字海

【字海】
该字暂无解释！希望有识之士提供！ (&quot;This character doesn't have an explanation yet! We hope someone who knows to add one!&quot;)

汉典

暂无解释，欢迎补充。(&quot;There is no definition for now, you're welcome to add one.&quot;)


Does Mandarin Ever Use This Character? If So, In What Context, With What Meaning?
I think the explanation is that Chinese is not only written but spoken, and a lot of characters, while used in idiomatic daily speech, don't really have a formal written counterpart. If you ask locals to actually write this character out, most likely they'll write a commonly used character with the same pronunciation. However, language experts who wrote the dictionary insist on assigning a formal written form to each character out there, and they recognize the fact that this character has a totally separate meaning than the commonly used surrogate character, thus they likely invented this new character just to represent this idiomatic sound. This is a common phenomenon if you browse through modern Chinese dictionaries.