FIESTAR's Jei, Cheska, and Cao Lu are back to teach you another Korean slang term in the final lesson of their series, 'FIESTAR's A-HA!'.

SEE ALSO: FIESTAR gives overseas fans a lesson on the word 'GaenSo' + asks fans to anticipate their comeback

As the girls explain it in three different languages, 'KkulJaem' is a combination of the word, 'kkul', which means honey and 'jaem' which is short for 'jaemee itda' which means fun. 'KkulJaem' is used when something is really funny, interesting, or fun.

All of the members of FIESTAR also made a surprise appearance and announced the sad news that this will be their final lesson. But don't worry as the girls will soon to greet you on stage with their comeback on November 1!

Learn or review the word 'KkulJaem' in the final lesson above!