ADJ-GRADED [verb-link ADJ]念念不忘的;过于担心的;过分介意的 If you say that someone is hung up about a particular person or thing, you are criticizing them for thinking or worrying too much about that person or thing. 念念不忘的;过于担心的;过分介意的 [informal, disapproval]
It was a time when people weren't so hung-up about health. [+ about/on]