To sneak up behind somebody with arms bent (such as a Velociraptor's). The subject Velociraptoring then makes a screeching sound and proceeds to bite their victim on the shoulder.
Person 1: "Ow man, my shoulder hurts!"
Person 2: "Why's that?"
Person 1: "Steve Velociraptored me when I wasn't looking!"
Person 2: "Oh yea I saw that! Velociraptoring is so funny!"