I have a 1998 ford mustang, and its exhaust as recently come loose, and I can't afford to get it properly welded and fixed, so does anyone know of a quick and sturdy fix that could last me a little while, till I can get it fixed? Thank you.

 

If it's at a joint, a socket set will be your friend. Loosen it fully, shift it back into place and tighten it down (snug down both side of the flange equally to make sure it seals up).