This word can be said in many forms, whether your mad, calling someone a shmeeger can be just the word to use to get back at them. They won't know what hit them.
It can also be meant as different nouns like eating some shmeegers or going to the shmeeger.
Also if you are annoyed instead of using a curse word shmeh is the perfect replacement

When you eat dirt for the first time and leave your family to build a shack in the woods