blah
noun/blɑː/
/blɑː/
[uncountable] (informal)- people say blah, blah, blah, when they do not want to give the exact words that somebody has said or written because they think they are not important or are boring
（觉得厌烦不想重复别人的话时说） - They said, ‘Come in, sit down, blah, blah, blah, sign here’.
他们说：“进来，坐下，干这个，干那个，在这里签字。”
Word Originearly 20th cent. (originally US): imitative. - They said, ‘Come in, sit down, blah, blah, blah, sign here’.