'Do you take....? I yabba dabba do!' is the headline in the Sun newspaper about two couples who had a Flintstones-themed double wedding in Norwich. One couple dressed as Fred and Wilma Flintstone and one as Barney and Betty Rubble. The 165 guests dressed as cavemen and women and the two best men as dinosaurs. The headline uses a well-known phrase from the cartoon/film to replace the usual response at a wedding of "I do".
More about British wedding customs and culture here.