1. Resembling a sustained ‘sh’ or soft whistle
   "a swishy skirt"
    
2. [N. Amer, offensive] Weal or having unsuitable feminine qualities
   "The actor's swishy portrayal of the character was criticized as stereotypical";
   - effeminate, emasculate, epicene, cissy [Brit, informal], sissified [informal], sissyish [informal], sissy [informal], camp [informal], campy [informal]

Derived forms: swishier, swishiest

See also: noisy, poncey [Brit, informal], poncy [Brit, informal], unmanful, unmanlike, unmanly