The phrase uses clipped internet slang, where bih is a softened spelling of a stronger word, and wit shortens with in casual speech. With no widely credited original source attached to this clip, its life is mainly on soundboards and short video edits, where the thirteen second length makes it easy to loop or trim to the hook. It spread as a reusable caption in audio form, picked up for fashion, dating and confidence jokes, and it remains used because the delivery is instantly recognisable even without context about who recorded it first.