Definition
The lion; Panthera leo.
Origins
Referring to the lion being a top predator in Africa, which was depicted in Western pop culture as a jungle.
How People Actually Use It
1.During a pornographic film, when a male ejaculates on a girl's, or multiple girls', breasts and/or face. 2.Blowing a hot gooey load all over a dirty slut.
"Dude, your mom was over last night, and she loved it when I performed the king of the jungle on her face."
Source: Urban Dictionary