Final answer:
A duck that steals can be referred to as a Kleptoquack.
Step-by-step explanation:
A duck that steals can be referred to as a Kleptoquack. This term is a combination of 'klepto,' which means stealing, and 'quack,' which is the sound a duck makes. The word 'kleptoquack' is a playful and creative way to describe a duck with a tendency to steal. While it may not be a widely recognized term, it can be used to add humor and engage readers in creative writing or storytelling.