What is a favor?

This is the conversation that happened between Chantry and mom.

Chantry: "Mom, what does favor mean?"

Mom: "What does favor mean??!"

Mom: "Dad, what does favor mean?"

Dad: (No response)

Mom: Well,favor means to do something special for someone.

(Slight break in conversation as Chantry thinks about this.)

Chantry: "Mom, will you do a favor?"

Dad: (Laughing!!)