Expression of surprise, dismay, or both.

Used other than figuratively or idiomatically: see oh, really. / (colloquial) An exclamation of surprise or amazement. / (colloquial, sarcastic) Said in response to an obvious statement.

Alternative form of smoko

(Internet slang, humorous) Exclamation of surprise or disbelief. / (Internet slang, humorous) Yes; I understand or can relate.

An expression of delight and joy, or, sarcastically, dismay, resignation, frustration, or annoyance.

Alternative form of daddy-o

plural of oh for

(dated) Alternative form of oh well.

very, extremely (often ironic)

Said in dismay, often sarcastically.