"chicken" and "pickle" are nicknames used in the 2005 movie "The
Squid and the Whale" by director and writer Noah Baumbach. In the movie, the children of the family are called chicken and pickle. The use of those names symbolizes the love of the
parents for their children in otherwise difficult times.
by some detours, the meaning got expanded beyond family bonds and now stands for two persons in love with each other. "Chicken and pickle
time" therefore means
time that two lovers spend together, usually having sexual intercourse.
Note: The movie also inspired the London Folkband "Noah and the whale" in the choice of their bandname