adj - a contemptuous expression borne of disgust in the presence of group gushings
"Keith's friends would not stop talking about Vampire Weekend. It was a truly disgushing experience
an abbreviated form of a set of words, that form being comprised of a combination of both an initialism(s) and acronym(s)
JPEG (Joint Photographic Experts Group) is both an initialism (J+P..) and an acronym (.."PEG"), therefore it is an acronism.