From Longman Dictionary of Contemporary Englishhave a thing about somebody/somethinghave a thing about somebody/somethinginformalDON'T LIKE to like or dislike someone or something very much, often without a good reason She’s always had a thing about Peter. → thing
Examples from the Corpus
have a thing about somebody/something• Judith has a thing about people chewing gum.• But, in this country, we used to have a thing about self-sufficiency. 