low·light 
/ˈloʊˌlaɪt/ noun
plural low·lights /ˈloʊˌlaɪt/ noun [count] US : something (such as an event or a detail) that is very unpleasant or dull : the worst part of something
▪ That meal turned out to be one of the lowlights of our vacation. — compare highlight
▪ That meal turned out to be one of the lowlights of our vacation. — compare highlight
