Hangul syllable jjaeb

It means a jab, literal or verbal.

쨉 points to the Korean loanword for a jab, a quick straight punch usually made with the lead hand. The same boxing image can describe a pointed question or a small verbal attack.

If someone sends 쨉 in an ordinary message, read it as “jab” first; the surrounding sentence tells you whether the punch is literal or verbal.

Where does 쨉 come from?

It is built by Hangul's regular syllable rules.

쨉 combines ㅉ, ㅐ, and final ㅂ. Hangul blocks place consonants around a vowel to form Korean syllables, so this is a regular block, not a one-off sign.

Hangul was created to let people write Korean more easily than with Chinese characters. The script was created in 1443; its explanatory book, 훈민정음 (“Correct Sounds for the Instruction of the People”), was published in 1446. Those dates mark Hangul's history, not the boxing loanword's arrival. The boxing word entered Korean later.

쨉 vs 잽: which should I write?

Use 잽 for the standard Korean boxing term.

Korean sports terminology writes 잽 for the quick lead-hand punch used to gauge distance, feint, or hit. Korean spelling guidance generally avoids tense consonants such as ㅉ in foreign loanwords, so 쨉 is a marked spelling, not a different punch.

In casual writing, 쨉 can add emphasis or carry the punch's figurative sense. For formal sports writing, use 잽.