Dead. (Pseudo-politically correct slang used for humorous effect.) The boss has ordered a hit on the stool pigeon, so make sure he's living impaired by the end of the day.

Deaf or partially deaf. Some deaf people advocate the avoidance of this term in favor of the more straightforwardly descriptive terms “deaf” and “hard of hearing.” Grandpa is hearing-impaired, so be prepared to speak loudly or repeat yourself a lot.