Bruh has long been a short, deadpan reaction to disappointment or disbelief in online videos, and bass boosting became a popular editing style for making ordinary sounds feel exaggerated and absurd. Pairing the two turns a quiet reaction into a dramatic drop, a trick that spread through short-form edits, gaming clips and reaction compilations. Its under-one-second length makes it easy to reuse, and because the joke is in the contrast between the small word and the huge sound, it still works even when viewers have heard it many times before.