lateral movement, the top will push in, the bottom will move out and back and fourth.

if the hub is bad enough the brakes will feel like crap too.

dont buy a cheap hub, get a timken, or moog or skf, the cheap ones are just that cheap, a few months later you'll be doing that hub again. the good ones have a 3 year warranty too. buy local, same price and on line minus the shipping, and should it go bad, you dont have to ship it back and be with out a car for who knows how long.