A more politically correct way of saying that someone's retarded.

To be ok at something or not that great.

Used in conversation to express your disbelief in the ridiculous statement or blatant lie someone just told.

When a statement or question can be contradicted with the word "except"

to be uncommon, unique, extraodinary. most likely to bring home to parents. can be a complete hoe but is welcomed because she is one-of-a-kind.

Not including,

An error condition in software that is generated by a program's inability to complete a task. Common causes of exceptions include division by 0 and calling of nonexistent files.