Worcester Sauce - found no applicable use for it in my entire life. As a student I worked in catering. Seen one in every kitchen and on every busboy station. Never seen it added to anything or been asked by customer to provide one for seasoning their food.
Pickled Eggs - except drunken bets in bars, and initial test "what else can we pickle" does a jar of aforementioned actually have any culinary use?
Steak and Kidney Pie - very popular apparently, never had one in my life. I don't quite understand how it's supposed to work, unless it's Joey from Friends type of thing: "what's not to like: steak - good, pie - good, lamb's kidneys - good"