One of the entries from Dictionary.com
fet·ish also fet·ich (fět'ĭsh, fē'tĭsh)
n.
1. An object that is believed to have magical or spiritual powers, especially such an object associated with animistic or shamanistic religious practices.
2. An object of unreasonably excessive attention or reverence: made a fetish of punctuality.
3. Something, such as a material object or a nonsexual part of the body, that arouses sexual desire and may become necessary for sexual gratification.
4. An abnormally obsessive preoccupation or attachment; a fixation.