Dey fast.
Explanation: This joke plays on the double meaning of the word “fast.” In one sense, “fast” refers to the act of abstaining from food during Yom Kippur, a significant Jewish holiday. In another sense, it means to move quickly. The humor arises from the absurdity of the idea that people wouldn’t mug Jews on Yom Kippur because they are “fast” (quick), while also being a clever nod to their fasting practice. The interplay between these meanings creates a humorous twist.