Heat is often used in the internet to refer to Rule 34 content, to bypass filters and algorithm blocks.
Most commonly known in community's such as the "Gacha" community, or the "Emoji Cat" community.
Person 1: "This kid is making Rule 34."
Person 2: "Heat. It's fucking called heat you dunce."
A very silly cat that lays down similar to a booger and burger.
Oh my god! Your cat is such a bunger.