(Internet slang) oh no

(idiomatic, euphemistic, chiefly US and Canada) oh my God

Alternative spelling of righto

(dated) Alternative form of oh well.

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

plural of oh for

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

Alternative form of rabbit-o

Alternative form of bottle-o