RhymeZone: joi definitions

Definitions of Joi:

name: A female given name (common: 1 in 33333 females; popularity rank in the U.S.: #2012)

noun: (BDSM) Initialism of jerk-off instructions: written or recorded instructions directing someone to masturbate.
noun: (astronautics) Initialism of Jupiter orbital insertion.

(Definitions from Wiktionary)