DICT.TW Dictionary Taiwan

 like fun
 起勁地,有力地;完全地,徹底地;決不會,才怪呢

 Fun n.  Sport; merriment; frolicsome amusement. “Oddity, frolic, and fun.”
 To make fun of, to hold up to, or turn into, ridicule.
 in fun, jokingly; not seriously; for amusement.
 like fun, definitely not; -- used adverbially, mostly to contradict a prior assertion; A: “He says he won't do it again.” -- B: “Like fun he won't.”.
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