The phrase "hot jam" refers to music that is really catchy, lively, and enjoyable to listen to. It's used to describe a song or performance that gets people excited and makes them want to dance or sing along. Full definition
Decorate with berries, then brush hot jam over the berries with a pastry brush. (lapechefraiche.com)
Jam doesn't last long in our house, so I fill clean jars with hot jam, cover them, let them cool, then refrigerate the jam until we're ready to eat it. (inerikaskitchen.com)
Ladle in hot jam or pickling liquid, or use a wide - mouth funnel, leaving headspace based on recipe. (bonappetit.com)