I think that the answer that @chocolate linked is pretty spot-on when it comes to kanji.
The simple answer is that kanji don't really have names. When there are many thousands of kanji used in daily writing, that would also require that there are many thousands of names for the characters. These names would be in addition to multiple readings, and the ...
It's uttered as a colloquial, casual and exclamatory phrase. It's typically used in response to a situation/stimulation that strikes you suddenly. っ is often added after the stem.
高っ! (Wow,) it's expensive!
やば(っ)! (Wow,) this is bad!
In formal settings, you should generally avoid this, but no one would blame you for ...