A male cheetah is simply called a male cheetah. Likewise, female cheetahs are referred to as female cheetahs. Young cheetahs are called cubs and typically stay with their mother until they are about 1 year old.
Male cheetahs are very social animals and often live in small groups with other males. Typically, this group is made up of sibling groups but can also be formed by unrelated groups of males. Male cheetahs are also very territorial, but because it would be nearly impossible for them to defend the territories of several females, they often select territories between female territories to cover as many females as possible in a smaller area.