Shmed

A person who just isn't on the level. Someone who isnt going to be helpful and doesn't want to be. Generally in the way and causing everyone else to do more than necessary to accomplish daily life tasks. Synonyms: Gump, Gomer, Clown, Ass, Loser.

That shmed who couldn't run his register wasted 10 minutes, and now I'm late.

Don't bring your shmed friend next time, he managed to make bowling not fun.