This is the slang component of the keyword. In file-sharing and release forums, “hot” refers to a source that is fresh, high-demand, and properly seeded (or readily available). When a user says they are signaling that the current supply of this specific file— Family Guy S14, uncensored, NF webrip, 1080p—is active, fast, and high-quality. It’s a stamp of approval from the community that the encode does not suffer from audio desync or compression macroblocking.