Monkey Fisting 

When a guy is so old that his balls hang low enough to drag on the ground like a monkey whose knuckles are just dragging behind him as he walks. Another phrase for Old Balls

HA YOU'RE 21?!?!?! MAN YOUR BALLS ARE SO MONKEY FISTING.

Monkey Fisting by Q?Z? July 22, 2009

Monkeyfisting 

The act of shitting in one's hand and making a fist. Then proceeding to shove one's fist in their partner's rectum

Chad and I enjoy a good monkeyfisting every night.

Monkeyfisting by Zomboy595 December 23, 2016

Monkeyfishing 

To write a story on a web site (the more respectable and prominent the better) that is complete and abject bullshit. From a famous incident involving Slate magazine where a writer wrote a story positing a sport involving fishing rods, oranges and simians, and (surprise!) it all turned out to be fabricated.

Obama is really the love child of Raquel Welch and Sammy Davis Junior? Interesting theory, but I think you're monkeyfishing.

Monkeyfishing by Odgred Weary October 20, 2010

Monkeyfisting 

Waving one's clenched fists around in the air (usually done while pissed off) while screaming and yelling at someone or something, thus appearing to be an angry monkey.

I cut some guy off in traffic today and he got out of his car and started monkeyfisting.

Monkeyfisting by Jen Brauer May 6, 2010