Multimeter misuse by shorting a 220 voltage through it
Yup, sounds like it's toast.  You can throw the thing away at any time, but it sounds like in this case that's about the only thing left to do if you don't want to salvage parts from it.

Fancy expensive meters might protect themselves from something like this, but 220 VAC in Ohms mode is really major abuse.  I can see cheap meters not bothering with protection for this kind of event.  The easiest form of protection if one were to be added would probably be a crowbar so the fuse pops.