Assuming you are talking about a kitchen drawer:
If your garbage drawer is loose and wobbly, there are a few things you can do to tighten it. First, check to see if the screws that hold the drawer in place are loose. If they are, tighten them with a screwdriver. If the screws are tight but the drawer is still loose, try adding some washers to the screws. This will give the screws something else to grip onto and should tighten up the drawer.
If the drawer is still loose after tightening the screws, you may need to replace the drawer slides. These are the pieces that the drawer sits on and slides in and out on. You can buy replacement drawer slides at most hardware stores. Once you have the new slides, simply remove the old ones and install the new ones in their place. This should solve the problem and tighten up the drawer.