Adjusted Penis Size 

From the SouthPark episode TMI. According to Randy Marsh, you can calculate your Adjusted Penis Size (or TMI) with the following formula:
((L*D)+(W/G))/(A^2)
Length times Diameter plus Weight over Girth divided by Angle of the tip squared

Randy Marsh has a penis that is 4.4 inches in length. Its angle is 32 degrees. It's flaccid girth is 1 inch in diameter. His balls are 7 cm from the base. Randy notes that the drift of his penis is 4 cm to penis right and its dead weight is 4.5 Kg. Therefore, Randy's adjusted penis size is 6.3 inches.

Adjusted Penis Size by Ingrid Cole June 21, 2011

mexican penis 

Pretty big

My boyfriend has such a Mexican penis

mexican penis by LittleDaddyBigDick December 9, 2016

thinking with your penis 

Cognition which is tainted by horniness; when a man makes decisions intended to satisfy the short term goals of his penis and fails to consider the long term consequences of his actions.

"Can't you tell she's a nasty skank? I think you're thinking with your penis".

thinking with your penis by Echo's gigolo September 20, 2013

Trench Penis 

Affliction of the male member that is caused by prolonged exposure to a partner's intergluteal cleft. Symptoms of trench penis include a burning sensation, swelling, discoloration, and a prickly or heavy feeling in the peen.

While spooning and lap-sitting are the most common causes for trench penis, any activity that involves arousal near a partner's anal bosom puts a male at high risk. Flatulence during these activities has been known to accelerate the onset of trench penis.

John was forced to use a wheelchair for 2 weeks during his grueling struggle with trench penis. His doctor advised him to try being the little spoon next time. I heard his prangus looked like a moldy cucumber.

Trench Penis by G.FRESH. October 10, 2016

Play it by penis 

Same idea as play it by ear, except pertaining to sexual situations.

Guy 1: So when you gonna do that girl?

Guy 2: I don't know, I'll just play it by penis.

Play it by penis by Jamal Rakens June 19, 2010

Frankenstein Penis 

A circumcised penis with a scar on the shaft and a gutted frenulum.

Look at the poor guy tug on his mutilated Frankenstein Penis. Glad I’m uncircumcised I hear they don’t get as much pleasure.

Frankenstein Penis by Where is my foreskin May 25, 2020

Guacamole nigga penis 

A type of penis found by Albert Einstein.

Very rare. If you have a guacamole nigga penis, your penis is 17”.

“Guacamole nigga penis” - black science man

Guacamole nigga penis by __-Ali-__ February 27, 2019