Sarcastic remark used to let somebody know that their
promises of fun haven't
materialized, and that if this is their idea of fun, then they have a very twisted concept of what "fun" is.
Dad drags his son to a museum,
promising that it'll be fun. When they arrive,
the son is, unsurprisingly enough, really bored.
Son: (in bored voice) Dad, are we
having fun yet?