In the Brothers Grimm tale “The Valiant Little Tailor,” the tailor displays the slogan “Seven at one blow” on his belt.
The tailor kills seven flies with a single swat after they disturb his meal. Proud of the feat, he makes a belt bearing the words “Seven at one blow.” People who see the slogan assume that he has defeated seven human enemies, not seven insects.
That misunderstanding creates the central comic tension. The tailor is not a mighty warrior in the ordinary sense, but he is clever, confident, and skilled at turning exaggerated assumptions to his advantage. He uses the reputation created by the belt to face giants and other dangers.
The German title is “Das tapfere Schneiderlein,” and the story is KHM 20. English editions vary between “The Brave Little Tailor” and “The Valiant Little Tailor.”