Similar to smiley_face, a frowney face is a minimalist symbol for a human face expressing unhappiness. At a minimum, has two dots for eyes and a line for the mouth.

See also:

• emoji # Those SMS texting symbols kids these days use
• emoticon # For frowney faces made out of text, usually written :(
• symbol # Some frowney faces are not symbols, especially if they are a character's actual face.