Malemasturbation. Inspired by a Mad-TV skit in which four men recharge various flashlights by shaking them, resulting in all manner of hilarity, including lots of doubles entendres and winking at male and racial stereotypes.
I came home from work early and there he was: right in the living room, charging the flashlight all over my Victoria's Secret catalog!
To put one's penis between one's legs and expose one's penis and ass to all surrounding people. This setup is often followed by the rhino running backwards after any audience, while bending over, simulating a rhino in a stampede, looking for a place to butt his horn.
"Man, he just charging rhinoed all of the swimmer boys in the locker room, until he found the rightgazelle to take advantage of."
The Charging Bull is a statue of a bull on Wall Street. It is a well known gathering site for the kind of poop eaters that work in finance. The bull is often used as the symbol of a strong stock market.