Jiwa is the most sensible and strong person. They are somebody who doesn't even know you exist. They don't take the time to get know everybody and become friends with everybody.
Mantap jiwa = jiwa yang mantap or very strong soul
Mantap jiwa means very good in Bahasa Indonesia, but it has different feeling when u using it. You should put the emoticon 👍 to express this feeling. Mantap jiwa also can be as Mantap soul. Jiwa means soul.
Eneng: How's my cooking?
Dedek: Woah.. Mantap jiwa! 👍 I very like it!!
Pronounced Jee-van but spelled with a "W" to act as a sound of the letter "V" twice. It's a name for booth genders and nicknames for it can be Jeeves , Jibs , Jee, Jeevie , Jeevus , Etc.