Today when I was driving I accelerated around a corner and the rear of my car started hoping what would cause this n how do I fix it? Also between the drivers side rear tire and the wheel well I can barely fit 3 fingers but on the passenger side I can fit 4 fingers and my rear alignment is out any help and info would be greatly appreciated thank you.

 

Thank you

 

The wheel well isn't "the car"; it's just trim.

A better place to measure is the inside of the wheel (something metallic, not affected by air pressure) to the bracket thing that the front end of the control arm bolts to (the most substantial part of The Car anywhere near there, to which the sheet metal is loosely associated)

The most likely cause of the rear being off-center, canted in the car, etc., is bent rear suspension components; the Panhard bar, and the control arms. They're SURPRISINGLY weeeeeeek: you (or at least, I) can bend them with nothing but bare hands. Very easy to damage by curbing the car. But also, very cheeeeep and eeeeeezy to replace, with stuff that's FAR better than the stock stamped sheet rubber.

I'm going to go out on a limb here and guess that your rear was actually "hopping", and not "hoping"? If so, that's the result of defective design from the factory, aggravated by the car being lower than it was (whether intentionally "lowered" or just sagging from age and wear) when new. But these cars did it the day they rolled out of the showroom floor; and it hasn't got any better as they've aged. The cure is lower control arm relocation brackets, which solve the flawed geometry.