(Lorelai walks in the front door carrying shopping bags.)
LORELAI: Rory, I’m back for round two [of their fight]. I got some Silly String in case things get really ugly.
Silly String is a toy consisting of flexible plastic string propelled as liquid from an aerosol can. It was first invented in 1972. Silly String fights are common among children.
The Annotated Gilmore Girls 