Analysis of information sources in references of the Wikipedia article "Jungle music" in English language version.
Even more common, especially in jungle/drum 'n' bass, is a break ... which fans and musicians commonly refer to as the 'Amen' break.
According to MC Navigator from Kool FM, 'jungle' comes from 'junglist', and was first heard in 1991 as a sample used by Rebel MC. "Rebel got this chant - all the junglists - from a yard-tape" referring to the sound-system mix-tapes imported from Jamaica. "When Rebel sampled that, the people cottoned on, and soon they started to call the music jungle.
Moose was the first person I heard using the word 'jungle'. It just came to us. Original hardcore jungle. Like you was in Africa. Like something tribal. It just came.