Crazily, ridiculously and utterly obsessed.

This word is often used when refering to crushes, but can be used to say someone has found a new favorite pasttime. Can sometimes mean dangerously obsessed to an unstable degree where one's friends seriously worry about that person's sanity.

The word "flinthired" originated when a very wise person said, "she is so obsessed with him, she would let him hire her to strike flint on a rock all day long."

This word is also an excellent scrabble play.