Youngle is a combination of "young" and "jungle" and it represents a new youth movement "Listen to the Youngle" that tries to empower young people to be proactive in their lives.
A youngle is a young person that is active, participates in various activities, is creative, knows what he/she wants from life and strives to get it.
A little pest who likes to burst into your room while your doing homework, or playing on your phone. They like to hit you, then like a little bitch, they tell your parents when you hit back. In other words...they are annoying. They are so annoying they make you feel like banging your head against the wall so hard you lose all your brain cells.
You: *on your phone*
Younger sibling: *bursting into your room and runs up to you* Hey!