Answer:
I am sometimes referred to as chips
I make things short but I am pretty long myself
I can run but not walk. Wherever I go thought follows close behind.
I run around the streets all day. Under the bed or by the door I sit at night never alone. my tongue hangs out waiting to be fed during the day.
I am easy to waste and unstoppable
I repeat only the last word you say. The more I repeat, the softer I got. I cannot be seen but can be heard. What am I?