kippen
to tip / topple
To bring something into a slanted position, or for it to be brought into one, so that it falls over or its contents are poured out.
Pass auf, dass du das Glas nicht kippst!
Be careful not to tip the glass!

to tip / to topple
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to tip / topple
To bring something into a slanted position, or for it to be brought into one, so that it falls over or its contents are poured out.
Pass auf, dass du das Glas nicht kippst!
Be careful not to tip the glass!

The perfect tense of 'kippen' (to tip/topple) is formed with 'haben' when it describes an active action. It is formed with 'sein' when it expresses an uncontrolled change of state, for example with a mood or a body of water.
Er hat das Wasser aus dem Eimer gekippt.
He tipped the water out of the bucket.
'Kippen' (to tip/topple) can be used with or without an accusative object. With an object, it means that someone actively knocks something over. Without an object, it means that something loses its balance and falls over by itself.
Der Wind hat meinen Stuhl gekippt.
The wind tipped over my chair.
In the figurative sense, 'kippen' (to turn) describes how a situation, an opinion, or the mood suddenly and unexpectedly becomes negative. It is often used for abstract things.
Zuerst waren alle für den Plan, doch dann kippte die Meinung der Mehrheit.
At first everyone was in favor of the plan, but then the majority opinion turned.
In news reports or political discussions, 'kippen' (to overturn) often means that a court or government stops a law, plan, or regulation or declares it invalid.
Das oberste Gericht hat das umstrittene Gesetz gestern gekippt.
The supreme court overturned the controversial law yesterday.
In colloquial language, 'kippen' (to knock back) means to drink a beverage, usually alcohol, quickly. This usage is very informal and has a slightly negative connotation.
Er hat auf der Party ein Bier nach dem anderen gekippt.
At the party, he knocked back one beer after another.
to pick up / keep / cancel
'aufheben' and 'kippen' can both mean that a law, plan, or decision is no longer valid or is stopped. 'aufheben' sounds more official and more precise, especially with rules, laws, and court decisions. 'kippen' is often somewhat more colloquial or journalistic and emphasizes that something falls through or fails. Learners may confuse the words because the result is similar. When an authority or a court officially invalidates a rule, 'aufheben' fits very well. When a plan suddenly does not continue or fails politically, 'kippen' often sounds more natural.

Nach viel Kritik kippt der Gemeinderat den neuen Bauplan.
After a lot of criticism, the municipal council overturns the new building plan.
Die Stadt hebt das Verbot nach drei Wochen wieder auf.
The city lifts the ban again after three weeks.