Indicates that the speaker is flattered because of something that the interlocutor said.

The traditional cry of a chimney sweep advertising his services.

plural of oh for

(slang, dated, mostly in the phrase 'like billy-oh') The greatest extent or degree of something; used in comparisons to indicate a superlative.

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.

used as an expression of frustration, disgust, disbelief, or incredulity

(UK, West Midlands) Used to indicate agreement. / (UK, West Midlands) Used to introduce a refutation, sometimes sarcastically.

An exclamation of error, concern, or awareness of a problem.

An expression of delight or joy. / An expression of dismay, resignation, frustration, or annoyance (sarcastic).

(informal, slang) Used to indicate agreement, often sarcastically. / (informal, slang) Used to introduce a refutation, sometimes sarcastically. / (informal, slang) An exclamation of excitement or joy