The term "pup" primarily refers to a young dog, especially one that is not yet fully grown, essentially a puppy

. It can also denote the young of certain other animals such as seals, kangaroos, wolves, coyotes, rats, or sharks

. As a noun, "pup" can be used as a term of endearment or nickname for a pet dog

. As a verb, "to pup" means to give birth to puppies

. In slang usage, "pup" can refer to a young or inexperienced person, sometimes implying naivety, or it can be an affectionate term for a friend in casual contexts

. Additionally, "pup" appears in some common phrases like "pup tent," which is a small portable tent

. In summary, "pup" is most commonly a young dog or similar young animal, but it also has verb and slang meanings related to youth or inexperience