[Lorelai and Rory are walking down the sidewalk]
RORY: So she coldcocked you, huh?
To be coldcocked is American slang meaning to be struck so forcefully that you are knocked unconscious. It appears to date to the early 20th century, but the origin is not known. The “cold” part is obviously from being knocked out cold, but no one can agree on the “cock” part.
The sign says it is the Autumn Festival again, which is supposedly the first weekend in November, but possibly continues right through until Thanksgiving.
The Annotated Gilmore Girls 