whump /ʍʌmp/noun 2verb 2forms 3 noun2 •(informal) A soft thumping sound. •(slang) A genre of fan fiction in which a character endures injury, torture, or other forms of physical and mental suffering.By embracing dark genres of slash such as ‘squick’ and ‘whump’, the art of mythagowood purposely skirts parameters of taste and acceptability. — 2014 verb2 •To make a soft thumping sound.[…] the sound of sheets drying on a line a windy day: whumping, whushing. — 1963 •(informal) To strike something with a whump. formswhumped · whumping · whumps