Similar to how a hypochondriac decides they are sick and the self fulfilling prophecy renders them ill, a gericondriac decides they are old and tired. Soon after, the gericondriac settles into a boring, vegetative state - doomed to live out their life as a shadow of their former selves.
Camille: I'm so tired, I think I'll head home soon.
Sean whispers to Kris: Wow, Camille is becoming such a gericondriac
Senior citizens. Could be used affectionately, humorously, derisively, or simply as a matter of fact depending on the speaker's tone of voice and whether s/he is a senior citizen.
John, give the Geritol crowd a break when you get on the bus. Those "Priority Seating" signs are there for a reason. It's very difficult for a senior citizen who needs to get around to do, say, shopping, to sit down or get up if s/he has sciatica and is forced to sit in the back of the bus.
Aging or geriatric rockstarsstill touring and performing. They are musicians who are old enough to be given geriatric health care.
Rolling Stones, Iron Maiden, Led Zepplin, The Who all contain gerirocktric musicians. Musicians who are well past their prime in terms of the age of rock musicians yet continue to perform and tour like they used to.
Pajama casual is a term used when working from home and preparing for a video conference. All business above the waist and your pajama pants down below.