What 뿔 means
A horn or antler.
It can also mean a hard protrusion. Korean speakers pronounce it roughly “ppul,” starting with a tense p.
An earlier spelling, ᄲᅳᆯ, appears in the 1447 Korean text Seokbo sangjeol. A proposed link to Silla’s highest noble title remains uncertain; Silla was an ancient Korean kingdom. Some older spellings used Chinese 角 for “horn.”
뿔이 나다 (“grow horns”) means “get angry.”
Is 뿔 an emoji?
No; it is Hangul text.
Hangul joins consonant and vowel letters in a syllable block; the font draws its outline.
A neutral Korean noun; the anger reading belongs to the full idiom.
Alone, 뿔 does not mean “angry.”
What it means when someone sends it to you
2 readingsQuestions people ask
1Why does 뿔 show as a box on some devices?
Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.
How to type 뿔
뿔\BFD4Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.