2. a word that is considered to be unmentionable; - Example: "`failure' is a dirty word to him"
WordNet (r) 3.0 (2006):
dirty word
n 1: an offensive or indecent word or phrase [syn: obscenity,
smut, vulgarism, filth, dirty word]
2: a word that is considered to be unmentionable; "`failure' is
a dirty word to him"