[canned definitions]
Jah is the shortened name for God YHWH, and Jehovah. Most commonly used in the Rastafari movement.
Rasta is the shortened name for rastafari, a Black youth subculture and religious movement that arose in the ghettos of Kingston, Jamaica, in the 1950s; males grow hair in long dreadlocks and wear woolen caps; use marijuana and listen to reggae music.
[/canned definitions]
With the 'jah' in your name I guess it was assumed you know what a rasta bivy kit is.