is the garbage disposal moving at all? meats are a bitch of a clog. this is the most busy time of the year for clogged sinks for this same reason. my brother;s company is getting mad calls right now to fix shit like this. if disposal isn't moving and water is backing up theres a spot on the bottom of it you can turn with an allen wrench and basically reset it and it'll be straight. as far as clearign the rset of the clog up if it's really not just that, you shouldcall a professional. you don't want to fuck with shit that deep into the wall yourself and risk further problems. i know a good place to call if you're wanting to go taht route.