No, this it not something from the Flinstones. Dinosaur eggs are actually a fruit mix/hybrid between a plum and an apricot. It also goes by the name of Dapper Dandy Pluots. This fruit is usually only available end of August to as late as October if you are lucky. I have already found some at Costco on Winchester Rd.
If you have not tried it keep an eye open for them. You might also find up 15 different types of Pluots out there, since this is their season.