boo word
n.β Β«Whatever their politics may be, the students interviewed were notβby their own perceptionsββliberals.β The world [sic] “liberal” has for them become, to use the jargon, a “boo” word, even a term of accusation.Β» ββAnnual Education Review: 17 Campus Whites Express Their Views” by Arnold Beichman New York Times Jan. 12, 1970. (source: Double-Tongued Dictionary)