Bweh circulates online as a standalone reaction clip shared on soundboards and in short video edits, rather than as a line tied to one confirmed scene. The spelling imitates the mouth sound itself, which helped it spread as a searchable meme label across anime and gaming communities. Creators reuse it as a shorthand for playful defeat, mock disgust, or a childish refusal, often looping the short clip or layering it over reaction faces. Its popularity comes from that flexibility, fitting many characters and situations without needing context.