The phrase "refrigerator jam" refers to the situation when a refrigerator is overly crowded with food and other items, making it difficult to find or access things. Full definition
When I have an abundance of any berries, I like to whip up a little refrigerator jam. (asaladforallseasons.com)
This natural ability to create a jelly - like texture requires a lot less sugar than traditional refrigerator jam or shelf - stable preserves, and gives the jam an extra healthy boost. (forkknifeswoon.com)
And use whatever jam you have and like, I used my beloved Simple Apricot Jam this time but you could also use this Black Currant Refrigerator Jam, the Rhubarb Strawberry Jam or the Rhubarb Raspberry Jam. (whereismyspoon.co)