It's a hideous game show that for some reason is really popular (particularly with women). Maybe because in the U.S. it's hosted by a "woman." As you probably guessed, I don't particularly care for it. Then again, my mother laughs at everything the hostess says (and I mean EVERYTHING). I'm not sure whether it originated in the U.S. or G.B.
The weakest link originated in the uk. It was created by the BBC to be the main competitor to Who wants to be a millionaire (Which is also British). The hosts is the same in both the UK and the US. Her name is Ann Robinson. Previous to becoming the host to this show, she was the host to a show called "watchDog", which she tracked down crooks and conmen and gave them a right old chewing. This is where the vicious streak comes from.