From Wiktionary, the free dictionary
From Sau (“sow, female pig”). Compare hunde- or hunds-, from Hund (“dog”).
sau-
- (slang) Intensifies nouns and adjectives.
- sau- + teuer (“expensive”) → sauteuer (“very expensive”)
- sau- + geil (“cool, awesome”) → saugeil (“very cool”)
- (slang, derogatory) Creates disparaging or pejorative forms of nouns.
- sau- + Wetter (“weather”) → Sauwetter (“terrible weather”)
- sau- + Arbeit (“work”) → Sauarbeit (“unpleasant work”)