Meaning:

A person who behaves in a very formal way and is often self-important. A very conservative person.

If someone is a stuffed shirt , his/her behavior is very formal, and he/she thinks he/she is a very important person.

• advertising - show your products to customers through radio, television or newspapers
  "What is the best way for us to advertise our product?"

•  afford - able to buy, have enough money to buy

"Television is the best advertising, but the most expensive. Can we afford it?"

Americans use the names of animals in many ways. Transcript of radio broadcast:
13 October 2007

Now, the VOA Special English program, Words and Their Stories. Today, we tell about the word wildcat.