der Klatsch
gossip
Informal, often disparaging or curious talk about other people's private affairs.
Im Büro gibt es immer den neuesten Klatsch aus der Nachbarschaft.
At the office, there's always the latest gossip from the neighborhood.

gossip / slap
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gossip
Informal, often disparaging or curious talk about other people's private affairs.
Im Büro gibt es immer den neuesten Klatsch aus der Nachbarschaft.
At the office, there's always the latest gossip from the neighborhood.

'Der Klatsch' (gossip / slap) is the noun related to the verb 'klatschen'. The verb means both 'to applaud' or 'to slap' and 'to gossip/talk about others'. This double meaning is also found in the noun.
Hör auf, über andere Leute zu klatschen!
Stop gossiping about other people!
You can easily recognize the meaning from context. If it is about talk, information, and people, 'Klatsch' means 'gossip'. If it is about a sound or a light slap, the second meaning is intended.
Ich interessiere mich nicht für den neuesten Klatsch über die Königsfamilie.
I'm not interested in the latest gossip about the royal family.
In the meaning of 'Gerede' (talk/gossip), 'Klatsch' (gossip) is very often used in the fixed expression 'Klatsch und Tratsch' (gossip and chatter). Here, both words basically mean the same thing and reinforce each other.
In der Kaffeepause gibt es immer den neuesten Klatsch und Tratsch.
During the coffee break, there's always the latest gossip and chatter.
When 'Klatsch' means a light slap, the construction 'jemandem einen Klatsch geben' (to give someone a slap) is often used. The object receiving the slap is in the dative.
Die Mutter gab ihrem Kind einen liebevollen Klatsch auf die Wange.
The mother gave her child an affectionate slap on the cheek.
blow / stroke
'der Schlag' and 'der Klatsch' can both mean a short strike or a short sound caused by an impact. 'der Schlag' usually sounds stronger and can happen with the hand, the fist, or an object. 'der Klatsch' is often a sharp or flat sound, for example when a wet hand hits the table, or a light slap with the flat of the hand. Learners may confuse the words because both have to do with hitting. Important: 'Klatsch' can also mean gossip about other people; in that meaning, it has nothing to do with 'Schlag'.

Mit einem lauten Klatsch fiel der nasse Lappen auf den Boden.
With a loud slap, the wet rag fell onto the floor.
Der Schlag gegen die Tür war so laut, dass alle im Flur erschraken.
The blow against the door was so loud that everyone in the hallway was startled.