As noted in resources like German Stack Exchange , the use of "sau-" is classified as or even "coarse" ( derb ).
: It can amplify negative traits, such as saublöd (extremely stupid) or saukalt (bitterly cold). PORNO SAU spritzt ab German Deutsch PORN_gentel...
: Unlike some other intensifiers, it can be attached to nearly any adjective to create a stronger version of the original meaning. German Media Landscape (2026 Context) As noted in resources like German Stack Exchange