PHILADELPHIA (CBS) – On today’s APP-tastic and outta SITE — the fine art of trash talking doesn’t come naturally to everyone. But if you’d like to really make your buddy feel like his team is inferior and don’t possess the skills, just go to RivalGrams.

There you can select the ideal slam and a trained trash-talking professional will leave a message with your heartfelt sentiment.

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Reported By Daniel Sieberg, KYW Newsradio