Meanings
colloquial · no pluraltrick, cheat, fraud, corruption (in a clement tone, or else implying something small in scale)
Im Baugewerbe wird viel Schmu gemacht.There's plenty of corruption in the construction industry.
colloquial · no pluralnonsense, horseshit (talk or ideas considered wrong or worthless)
Du meinst immer nur Empathie. Den Schmu mit Astrologie kannst Du getrost weglassen.You're always just talking about empathy. You can just drop the astrology nonsense.