LORELAI: I thought he [Rune] was only here for a weekend.
SOOKIE: Yes, the lost weekend.
The Lost Weekend is a 1945 drama film directed by Billy Wilder, and based on the best-selling 1944 novel of the same name by Charles R. Jackson. It stars Ray Milland as an alcoholic writer, and Jane Wyman as his long-suffering girlfriend, and the “lost weekend” is a weekend vacation the writer planned to take, which turned into him losing himself in drink, and even being committed to Bellevue.
The Lost Weekend was the #11 film of 1945 and won four Academy Awards, including Best Picture, Best Director, and a Best Actor for Ray Milland. It also won the Grand Prix at the 1946 Cannes Film Festival, with Milland picking up another Best Actor Award; it is one of only two films to win the highest award at both the Academy Awards and the Cannes Film Festival.
Sookie doesn’t mean that Rune is an alcoholic; just that he was meant to stay with Jackson for a single weekend, but that weekend is long “lost” as he still hasn’t left some three months later.
The Annotated Gilmore Girls 
The “lost weekend” is also a euphemism commonly used to describe the year John Lennon of the Beatles left his wife Yoko for another woman — he later returned to Yoko. I think that’s what Loralai was referring to because she calls Sookie “Yoko,” right after Sookie says it.
By the way, this website is super fun!
LikeLiked by 1 person
Thanks so much for that! I always hoped that readers would be able to add more information to the blog and solve a few mysteries.
I all makes a lot more sense now. I have updated the entry on Yoko Ono to include that information, and credited you with supplying it.
Thanks for reading, commenting, and helping out! It’s more fun when we’re in it together. 🙂
LikeLike