Going down on a woman while she is on her period; coming up Fred Flintstone faced.
His face was two-toned like Fred Flintstone after that unfortunate encounter.
by Gison April 13, 2010
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THIS MEANS THAT SOMEONE IS REQUESTING TO BE LAID BY SOMEONE ELSE.
GIRL: "SO WHAT DO YOU WANT TO DO TONIGHT"

BOY: "I'M NO FRED FLINTSTONE BUT I CAN MAKE YOUR BED ROCK"
by Hullo, have a goode one January 28, 2010
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Fred Flintstone, or Fred, is a placeholder name for any man whose name you do not know that fits the following requirements:

Has a temper, impatient, womanizer, macho, overweight, hair is thinning, five o'clock shadow, blue collar, has a favorite bowling ball, mows the lawn three times a week, at least forty years of age, doesn't do "women's work", says words like "gizmo", "gadget", "reefer", and MonDEE, quotes Andrew Dice Clay five times a day, is homophobic, right-wing, listens to Bruce Springsteen and The Beach Boys, reads the periodicals, has a skin tag, watches the local news, has a landline phone, wife is a red-head, has a friend named Barney, daughter brought home a foreigner. NOT TO BE CONFUSED WITH Hank Hill, Charlie Brown, or Homer Simpson.
Neighbor: Hey you! Stop all that swearing while you're outside! There's ladies here!

Guy: No problem Fred.

Neighbor: What was that!!!?

Scenario 2

Co-worker: If that yuppie intern keeps smart mouthing me, I'm gonna give him a knuckle sandwich!

Guy: Hey! Calm down Fred Flintstone. He's just a kid.

Co-worker: How many times do I have to tell you? My name's not Fred... WILMAAAAAAA!!!
by pablo2by4 April 23, 2016
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A huge monster schlong thats a super chode, but is insanely callousey because thats what Fred Flintstone sues to stop his car.
He definitely has a Fred Flintstone.
by IBILISTAKID December 11, 2021
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