Hangul syllable Bbwaj

Switch to a Korean input method and enter ㅃ, ㅘ, then ㅈ.

On the 2-set Dubeolsik keyboard, press Shift+Q, H, K, W in that order: Shift+Q enters ㅃ, H then K forms ㅘ, and W enters ㅈ. The input method joins them as you type. If the letters stay separate, check that Korean input is active and enter them in this order.

What does 뽲 mean?

뽲 is one Korean syllable block, not a chat reaction.

For Korean typing, its parts are initial consonant ㅃ, vowel ㅘ, and final consonant ㅈ. Unicode's joining form uses ᄈ + ᅪ + ᆽ; a font may display the composed block and separated letters differently, but that does not create a second meaning.

The block alone does not tell you which Korean word or intention someone means. Read it in the surrounding word; if someone sends it by itself, ask for context instead of inferring a reaction.

How did Hangul syllable Bbwaj develop?

Hangul was devised in 1443 to write Korean more directly.

An explanatory text called Hunminjeongeum was published in 1446 to introduce the new script. These dates belong to the writing system; they do not date the first use of each individual syllable.

Before Hangul, Korean writing also used Chinese characters and adaptations such as idu, hyangchal, and gugyeol to record Korean words and grammar. The Hunminjeongeum introduction framed the new script as an easier way to write Korean. Those earlier systems are historical context, not alternate readings of 뽲.