What is the meaning of Jambo?

Obsolete form of jambul.

iamb

genitive singular of jámbas (“iamb”)

fruit of the plant Syzygium jambos; rose apple

fruit of the plant Syzygium cumini; jambul

only used in me jambo, first-person singular present indicative of jambarse

thing, affair, issue, matter

hello

Source: wiktionary.org