sexual intercourse between two or more older individuals.
Man, those old people in that movie were having geriatric sex! I almost puked!
by princess1987 November 25, 2010
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When one is going well under the speed limit do to an old person driving in front of them, forcing them to be late, pissed off, etc
(Calling on a Cell)

Lisa: Hello
John: Hey, its me
Lisa: What's up
John: I'm going to be late, im caught behind some major geriatric traffic on broadway avenue.
by Carlos, NY January 10, 2010
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The alternate/additional Christmas holiday celebrated at least 6 months before the December holiday, because family/loved ones question whether granny or any other geriatric will live to experience the December holiday.
Martha: " Why is Ted decorating the old folks home's Christmas tree in June?"
Hector: "Ted's banking on half the residents keeling over before December. He's celebrating a Merry Geriatric Christmas!"
by Chili2 January 23, 2017
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A common medical disorder in which a cantankerous, old, senior citizen will not stop swearing. Usually directed toward ungrateful "youngsters" meaning anyone from 1 to 55 years of age.

The reasons behind this ailment are quite simple. They've lived long enough that they no longer give a shit who they annoy. So you damn well better listen, you ingrate, or you're gonna get a cane upside your head.

Also known as G.P.D.
Example 1

Person 1: Man, can you believe Craig's creepy uncle? I was just walking by his room, minding my own business, when he poked me with his cane and called me a no good poncy faggot.

Person 2: Yeah dude, he's got a bad case of G.P.D. I'm getting him Brad Goodman's self-help video this Christmas.

Example 2:

Doctor: I'm afraid it doesn't look good Mister Daniels. You have an advanced case of Geriatric Profanity Disorder, and I'm going to have to advise immediate euthanasia.

Mr. Daniels: Speak up you pompous son of a bitch!
by Lord Fossilwick of Sussexshire January 13, 2010
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When you take an elderly woman’s false teeth out and stick them in her ass and then you perform anal sex on her.
Yo dude, I picked up this old bitch at Bingo last night. The dumb ho wouldn’t stop talkin’ so I gave her the Geriatric Poly Probe
by DartmouthInDaHouse June 05, 2009
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Reminiscent of Thumper the rabbit from the Bambi cartoon, it is the practice unique to elderly people in which they quickly tap their foot on the floor several times in rapid succession immediately prior to raising that leg off the floor so that they can quickly slide on that side of their underwear, pajamas, or pants before falling. Contradicting the apparent belief underlying this behavior, studies by gerontologists have concluded that the Geriatric Thumper Dance is mostly ineffective in preventing old folks from losing their balance.
Samantha: "Grandma, how long have you been lying on the floor this time?"

Grandma: "Sweetie, I'm so glad you came along when you did."

Samantha: "Please Grandma. No more Geriatric Thumper Dance, OK?
by Perv Johnson November 21, 2010
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An older woman that rubs on, hugs, kisses, touches awkwardly a younger man in front of people to give impression something more is going on than is.
At the club my best friends mom turns into a geriatric organ grinder.
by ardoubleuanda September 02, 2013
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