der Stuss
nonsense
A colloquial expression for nonsense, stupid or meaningless talk or behavior.
Glaub doch nicht so einen Stuss, das ist doch frei erfunden!
Don't believe such nonsense; it's completely made up!

nonsense
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nonsense
A colloquial expression for nonsense, stupid or meaningless talk or behavior.
Glaub doch nicht so einen Stuss, das ist doch frei erfunden!
Don't believe such nonsense; it's completely made up!

'Stuss' (nonsense) is an uncountable noun and is always used in the singular. A plural form practically does not exist.
Er redet den ganzen Tag nur Stuss.
He talks nothing but nonsense all day.
This word clearly belongs to colloquial language. You should avoid it in formal or written contexts. It expresses strong rejection of a statement as nonsense.
Hör auf mit dem Stuss und sei endlich ehrlich!
Stop with the nonsense and finally be honest!
'Stuss' (nonsense) is often combined with verbs like 'reden' (to talk) or 'erzählen' (to tell). As an exclamation, 'So ein Stuss!' (What nonsense!) or 'Was für ein Stuss!' (What nonsense!) is very common for describing something as complete nonsense.
Was du da erzählst, ist doch totaler Stuss.
What you're saying is total nonsense.
crap / manure
'Mist' and 'Stuss' can both mean nonsense. But 'Mist' is broader: it can also mean a bad thing, poor quality, or an unpleasant situation. 'Stuss' fits especially well for stupid, meaningless talk or behavior. Learners may confuse the words because both express that something should not be taken seriously. When talking about a bad thing in general, 'Mist' is more natural. When someone says something meaningless or has a stupid idea, 'Stuss' is more precise.

Selma redet Stuss, weil sie die Aufgabe gar nicht gelesen hat.
Selma is talking nonsense because she hasn't even read the assignment.
Diesen Mist aus dem Internet glaube ich nicht.
I don't believe this nonsense from the internet.