What is this icon mean?!

no it does not mean that.......why do people who do not understand what they see always assume the worst????

first off you would see the screen move and respond to whoever would have been controlling the phone. and if somebody were to hack your phone to do that, their goal is to be undected so that they can steal any data they can from your phone. there would be no notification to alert you something is happening.

second in order for us to help we need to know what phone you have. it might help with identifying the icon.

and thirdly you should be able to pull down the notification bar from the top of your phone. it should tell you what the notification is. if it does not you can go into your phone's settings and under notifications it should be listed there on what it is.