ka-backhand
You slap someone with the back of your hand like it’s the end of the world and you just said KA-BACKHAAAND, and you probably did it because they talked too much or they wouldn’t let you win.
I ka-backhanded my teacher when she said I failed the test.
I ka-backhanded my friend because he said I was ugly.
I ka-backhanded my brother when he told me I was a loser.