used as a mild exclamation or oath; often used to add a mild or ironic emphasis to what is being said UK,1849 By reduplication of DEAR!.
[T]here she is, slagging him off left right and centre ... dear dear dear, what is this country coming to when a defenceless disabled person is attacked in this way? Oh deary deary dear. — Damon Rose, Ouch!, 7 March 2003