der Furz
fart
Colloquial, often considered vulgar, for the audible or smellable release of intestinal gas from the anus.
In der peinlichen Stille ließ jemand einen lauten Furz.
In the embarrassing silence, someone let out a loud fart.

fart
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fart
Colloquial, often considered vulgar, for the audible or smellable release of intestinal gas from the anus.
In der peinlichen Stille ließ jemand einen lauten Furz.
In the embarrassing silence, someone let out a loud fart.

This word is very colloquial and is often perceived as vulgar or childish. You should definitely avoid it in formal or polite conversations.
Bitte benutze solche Wörter nicht am Esstisch.
Please don't use words like that at the dinner table.
The literal meaning (intestinal gas) is often used with the verb 'lassen' (to let). The figurative meaning (nonsensical idea) is usually used with 'sein' (to be) or 'werden' (to become).
Der Hund hat einen Furz gelassen.
The dog let out a fart.
The noun 'der Furz' (fart) belongs to the verb 'furzen' (to fart), which describes the corresponding action. Both words belong to the same colloquial register.
Es ist unhöflich, in der Öffentlichkeit zu furzen.
It is rude to fart in public.
When an idea or plan is referred to as 'Furz' (load of nonsense), it doesn't just mean that the idea is bad. It expresses that it is completely insignificant, ridiculous, and not worth talking about.
Er sprach von einer Revolution, aber am Ende war alles nur ein Furz.
He talked about a revolution, but in the end it was all just a load of nonsense.
wind
'der Wind' and 'der Furz' can both refer to the release of intestinal gas. In this meaning, 'Wind' is a careful, medical, or euphemistic formulation. You are more likely to hear it in conversations about health or when someone wants to stay polite. 'Furz' is very colloquial and can sound vulgar. It is more suitable among close friends or in the family, but not in formal situations. If you want to speak neutrally or politely, 'Wind' is safer; 'Furz' sounds direct and crude.

Im Kinderzimmer lachten alle, weil jemand einen lauten Furz gemacht hatte.
Everyone in the children's room laughed because someone had let out a loud fart.
Nach der Operation konnte der Patient endlich Winde lassen.
After the operation, the patient was finally able to pass gas.