One who is very angsty but very cute while being angsty.
One who is so angsty that you want to hug him/her.
See also adorable.
"John is such an angstmuffin sometimes."
"Yeah, I know, you just want to give him a hug. He's so heart-wrenching."
A person or character who is angsty, but in a huggable way; a character who is fun to put in angsty situations. Usually a character/person who needs a hug due to their sadness.
"Rya is my angstmuffin."