a young trainhopper. This is a sometimes affectionate, sometimes derogatory term that old train riders gave young train riders. the term FLINTSTONE KID is derived from the tendency of young riders to have bones in their noses, orange hair, and skateboards; i.e. known punk regalia.
We are Flintstone Kids: one million strong, and growing.
by dorkhammer October 27, 2007
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The oldest guy on the forum/in the current thread. Not even a little bit "with it". Will occasionally talking about his rash or back pains.
Thread Flintstone brought it up
by MetalSpork June 4, 2011
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Eating in the modern era that we live in rather than suffering for no good reason. A diet consisting of burgers, ribs, shakes and fries. A complete rejection of fad diets like "paleo" and "gluten free". Living life like it should be lived, in the modern era.
Being on the Flintstone Diet is the only diet for me. All the other fad diets are completely ridiculous. Give me a beer with those fries please. It's okay, I'm on the Flintstone Diet, and I exercise regularly and eat in moderation, so no worries.
by KardenKarden May 1, 2015
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Freaky-deaky, loco, crazy, out of control, manic
Ted: "You heading to East Beach this weekend?"

Jenny: "Nah, it's gonna be Wilma Flintstone.. probably can't even park within five blocks.."
by Dr. Gorgeous June 5, 2009
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A very large prime rib or any large steak.
We went to a steak place on Friday. My date went for the queen's cut, but I got the Flintstone cut.
by brighton71 October 5, 2007
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A peculiarly strong performance enhancing drug that is most commonly used to allow men more “rounds” in bed
Peter: Ay Shawn ya got any Flintstone Vitamins?
Shawn: God dammit Peter, she’s still that horny?
by Quarantine_boredom April 15, 2020
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When some one sticks their toe into another's ass, then fucks them with it and/or wiggle's it around inside their poo-shoot.
I was watchin' this porno, and these two girls Flinstoned each other. I think one of them yelled, "Yabba Dabba Doo!"
by Hrny Devil July 16, 2003
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