piggy

Concise Oxford English Dictionary © 2008 Oxford University Press:
piggy/ˈpɪɡi/

▶noun (pl. piggies) a child's word for a pig or piglet. ▶adjective resembling or likened to a pig, especially in features or appetite.

– phrases
piggy in the middle chiefly Brit.

• 1 a game in which two people attempt to throw a ball to each other without a third person in the middle catching it.

• 2 a person who is placed in an awkward situation between two others.