After a Papa John's Pizza driver delivered a pizza to a Sanford, Fla., customer and his wife Sunday evening, he "butt dialed" the customer and left a voicemail message laden with racial slurs as he complained about his tip.

The customer posted a video on YouTube in which he showed the pizza delivery receipt, explaining he and his wife tipped 21 percent, "as usual."

In the voicemail message, which lasts about four minutes, the Papa John's employee complains to another Papa John's employee about the $5 tip and uses the N-word and other racial expletives, which he also incorporated into a song about the customer.

"I guess that's the only requirement for being a [insert N-word] in Sanford," a city still reeling from racial tensions after the shooting of Trayvon Martin last year.

"Yeah, they give me five bucks there -- fine outstanding African-American gentleman of the community," the delivery man can be heard saying in the call.

His fellow co-worker laughed in response.

Both of them were immediately fired, and Papa John's CEO John Schnatter sent a public apology via Facebook.