"Hot dogs turn into monkeys" is an online buzzword, which means that people are as hot as dogs and as cold as monkeys. It means that when the temperature is extremely hot or cold, people are in a mess

Dogs are born without sweat glands, so they can only stick out their tongues and breathe hard to dissipate heat. When the weather is hot, the dog will lie on the ground, sticking out his tongue and panting. Because monkeys don't have much fat, they are afraid of cold. In extremely cold weather, it will tremble all over and look funny. Therefore, the embarrassing image of people when the temperature is cold and the fire burns for two days is described as hot as a dog and frozen as a monkey.