What is it called ? ..............................…

OK here is my question everytime am talkin on the phone and i have something in my hand like paper or a pen i start writing stupid things like my name and things like da.. but its not only da i start ripping da paper off or even eating it ( i know i know weird) and i mean everything i have in my hands i try to destroy it .. it can be wutever and its not only on da phone but is wutchin tv or when am not doin anything .. so i would like to know if there a name for dis ? maybe a disorder?