Give us a little more info... I'm assuming your wheels are jacked up, and you're grabbing the front wheels and wiggling them? If that's the case, it sounds to me like wheel bearings, which is a fairly simple thing to replace or repack. But if they have been run long like that you should plan on replacing them. You should also have a look at all of the bushings associated with your steering. They could be worn out, and worn bushings will make you go all over the road.
Go Fish! <*////><
But the right word at the right time... "Hey, give me a little hug!" That's the difference between lightning and a harmless lightning bug!