When you commit fellatio on a female during her period while its marinated by flavored lubricant to offset the mettalic flavor, thus resembling the flavor of a Flinstone Vitamin.
Person 1: "Babe im on my period but can you eat me out?"
Person 2: "Oh hell naw bitch i dont need no Flinstone Vitamin I took a One a Day Mens."
The act of penetrating from the rear, her legs being wrapped around your waist, she is holding herself off the ground with her hands, all while simultaneously moving forward with you in a very "cave man," Fred Flinstone Mobil type fashion; all while shouting "Yaaba Daaba Doo!"
I knew the very moment I met you, that we were destined to do the "Fred Flinstone" with each other.
Noun:
A finishing move performed by a male. When he cums, he yells at the top of his lungs "yaba daba doooooo" and cums on his partner. The louder the better.
*guy pumps very hard*
"I'm about to... yaba daba dooooooo!!!!"
This means a type of gift (usually from a husband to his wife) that was bought for his use, and her birthday, Christmas, etc. was a scapegoat for it.
A man may buy his wife a fishing rod for her birthday, and when she says she would never use it he jumps on the chance to use it for himself...this is a classic Fred Flinstone Gift.