To my DD, who occasionally shows up much later than she said to expect her: "I do hope you aren't pulling a Gloria?"
Translation: Bro's wife is consistently at least 45 minutes late to anything/everything. She's the one -- after holding dinner and making other guests wait her arrival for the third time-- to whom I said with the next invitation: "Dinner is served at 7. I'll set a place for you, but I will consider the meal over when we have finished eating. " Upon her next arrival (near 8:30), I smiled sweetly and said, "You may be in time for dessert, I think there's a piece of pie left." From that time on, 'pulling a Gloria' meant that someone was becoming consistently tardy, and we weren't going to cater to it.
I'm sure other families have similar codes: an innocuous phrase meaningless to non-family members.