The phrase comes from everyday cooking language, where deglazing means adding liquid to a hot pan to lift the browned bits left after searing. As a short isolated clip, it spread through meme soundboards and short form video as a reusable reaction line, detached from any single recipe. Creators reuse it because the question is specific enough to be funny but familiar enough for anyone who cooks to understand instantly. It now works less as instruction and more as a shared kitchen in joke.