Why didn't you answer when I called you from a paper cup? What do you mean?

Make fun of someone for not answering the phone or being slow to respond to something. "Why didn't you answer when I called you with a paper cup?" This is a joke, meaning "I made a simple phone call from a paper cup and called you." Why don't you answer it? " This sentence is usually used to make fun of someone who doesn't answer the phone or is slow to respond to something. This expression takes advantage of people's general understanding of paper cups, that is, paper cups can be used to make simple telephones. But in fact, it is unrealistic to make a phone call with a paper cup, so this sentence is just for teasing and joking, not really making a phone call with a paper cup.