This Scooby-Doo t-shirt shows the mystery solving dog biting his nails in fear. The shirt includes Scooby-Doo's classic phrase, "Ruh Roh". In Scooby-Doo, Where Are You!, Scooby-Doo traveled in the Mystery Machine van with his crime-solving group of friends, known as Mystery, Inc. The team usually solved crimes in locations that were supposedly haunted. When Scooby-Doo sensed that the monster of the episode was near, he would fearfully say, "Ruh Roh". Scooby-Doo, Where Are You! is one of the most popular animated series of all time. Let everyone know that you are a fan with this Ruh Roh Scobby-Doo T-Shirt!