pup

Concise Oxford English Dictionary © 2008 Oxford University Press:
pup/pʌp/

▶noun

• 1 a young dog.

• 2 a young wolf, seal, rat, or other mammal.

• 3 dated a cheeky or arrogant boy or young man.

▶verb (pups, pupping, pupped) give birth to a pup or pups.

– phrases
sell someone a pup Brit. informal swindle someone by selling them something worthless.

– origin C16: back-form. from puppy, interpreted as a dimin.