LORELAI: You’re pulling a Mr. Freeze on me.
Mr Freeze (Dr Victor Fries) is a supervillain from the Batman comics, created by Dave Wood and Sheldon Moldoff in 1959, and originally called Mr Zero. Mr Freeze was a rogue scientist whose design for an ice gun backfired, spilling cryogenic chemicals on himself, so he needed sub-zero temperatures to survive. The Batman television series gave him a more sympathetic back story, making him a complex, tragic character. He was portrayed by Arnold Schwarzenegger in the 1997 Batman film.
Another example of Lorelai using comic books as a reference point.
The Annotated Gilmore Girls 