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Glider is reference to the space where your ass cheeks meet and jungle is used when refereing to an abundance of hair. Therefore jungle glider would be the space between your ass and is also very hairy.
I was running my penis through this girls glider and boy let me tell you, she had a bad case of the jungle glider.

Look at that girl over there with her pants hanging down, you can see she has got a case of the jungle glider.
by J-tweezy June 09, 2005