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by have_faith 1606 days ago
No we don't say that. We would only say that it tastes off. We really only use the opposite with regards to events, this event is on, Daniell's birthday surprise is on, etc.
2 comments

Right, the usage is the same in the US. If an event is proceeding ahead as planned, it’s on.
As well as an event, a drink on tap can be ‘on’ or ‘off’, to refer to its availability.