RICHARD: Oh, what have you done now?
LORELAI: Nothing. I just, well, I’m putting the bunny back with his little friends and I just sort of massacred them a little bit, but that’s life in the jungle isn’t it?
“That’s life in the jungle” is a phrase suggesting that it’s a tough world out there, and if anything goes wrong you have to take it in your stride. It’s especially applied in the corporate world, and seems to date to the 1980s.
The Annotated Gilmore Girls 