steering seems like driving a boat? HELP!

So im driving today and i dont know when this started but when im turning at highway speeds its seems like it steers like a boat. Not like sharp precise turning. Any ideas what this would be? I'm clueless!

Did you just get new tires? If you did the tires you bought have
side walls are to soft. and make the car feel loose when turning
at a higher speed.
If you didn't get new tires Check the Air presure It's low.
or the side wall is just weak