...they became a reference in pop culture?
At first, sorry for my bad english. I'm french.
The snl show exists since more than 35 years and there is a lot of sketch inside. So, I suppose, some of them came to be cult. there are some which, you are in a special situation, everybody thinks at them.
I'm not sure that I'm very clearly.
For example (sorry, it's a french example), in a very well know french comedy (la vie est un long fleuve tranquille http://en.wikipedia.org/wiki/La_vie_est_un_long_fleuve_tranquille), the two families who are in the movie became very cult. So cult that during a long time, the two families's surname were used to represent a uptight french catholic bourgeois (family's name Le Quesnoy) or french redneck (beauf) (family's name Groseille).
If you don't understand what I want to say, don't hesitate to say me. Don't hesitate to correct me too.