Waht is the difference between pive aggression and opositional defiant?

i have this problem, i dont like people ordering me around. telling me what todo. i hate authority. when tey tlel me what to do, i say i'll do it, but dont. wil do anything to not comply! when someone tells me waht to do, i get real angry, i just can hardly take it? what is this called and what can i do about it?