prod at (someone or something)
To poke or jab someone or something, especially in a gentle or curious manner. Quit prodding at me—I'm awake, for Pete's sake! I don't know why you would prod at a hornet's nest and expect them not to attack you.
prod at someone or something
to poke at someone or something. The boys prodded at the prone body of the man to see if he was dead or sleeping. If you prod at the turtle, it will never come out of its shell.