(also lah-di-da ) / ˌlɑː di ˈdɑː; NAmE /
■ adjective
( informal , especially BrE ) used to describe a way of speaking or behaving that is typical of upper-class people but that is not natural or sincere
SYN affected
■ exclamation
used when sb is irritating you, because they seem to think they are more important then they really are
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WORD ORIGIN
late 19th cent.: imitative of an affected manner of speech.