Keep The Jungle Massive

Keep The Jungle Massive! Anybody knows what it means? My friends used to hear this everyday from local Irish guy. Unfortunately we are both non-native English speakers and don't know the meaning of this phrase :-( but it sounds cool... Can you help us to understand? Is it related to jungle hardcore music, drum & bass?

Guy1: Bye!
Guy2: Keep The Jungle Massive!

22👍 8👎