The pinnacle of all English [swearwords], thundercunt is phoenetically, spiritually, grammatically, and socially the worst thing you can ever say. Much like a [Holy Hand Grenade] or the most powerful zord from [Power Rangers], it should only be used in times of extreme need
> Man: Larry, your home just burned down, and the arsonist fucked your wife
> Larry: THUNDERCUNT!!!!
> Universe: Shatters a little bit, shaken to its very core