A fork of Rural Dictionary
Being shocked beyond all reason and no other words that can escape your mouth. Can be used to express shock, grief, amazement, disbelief, annoyed, etc.
Guy 1: Who is Chuck Norris? Guy 2: Are you serious? Guy 1: Yea. Guy 2: O dear.
when somebody says something so utterly stupid that it simply has to be shouted sarcastically accross the room
aimee: are polar bears made out of fibre-glass? frank: O DEAR!!!