pup

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A young dog; a puppy.
• noun One of the young of certain other animals, such as wolves, coyotes, rats, seals, or sharks.
• noun An inexperienced or conceited young person.
• intransitive verb To give birth to pups.

from The Century Dictionary.

• To bring forth pups, as a bitch; whelp, as a carnivorous quadruped.
• noun Same as puppy, 2.
• noun A local term current among the Klondike gold-miners for tributary streamlets of the second order.

from the GNU version of the Collaborative International Dictionary of English.

• noun A young dog; a puppy.
• noun a young seal.
• intransitive verb To bring forth whelps or young, as the female of the canine species.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A young dog, wolf, fox, seal, shark and some other animals.
• noun A young, inexperienced person.
• noun Any cute dog, regardless of age.
• noun A short semi-trailer used jointly with a dolly and another semi-trailer to create a twin trailer.
• verb intransitive To give birth to pups.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun an inexperienced young person
• noun young of any of various canines such as a dog or wolf
• verb birth