quectopenis 

The smallest possible penis according to the current set of SI prefixes, smaller than even the rontopenis. A quecto penis is to a penis what a penis is to a quettapenis, making it one of the smallest objects in the known universe. Not even God Almighty can save a poor soul with a quectopenis.

Dude 1: What is it? Is my son okay?
Dr. Dingleberry: He would be, yes, but I'm afraid he has a quectopenis. We need to graft a proper penis over it to ensure he can urinate correctly.
Dude 1: FUCK!

quectopenis by PhallicInternationale June 23, 2023

Quettapenis 

A word that, as of late 2022 when quetta became the official prefix for 10^30, nerds can use to say how massive their member is. 1000 times larger than a ronnapenis, and a million times larger than the yottapenis. A yottapenis is in turn 1000000000000000000000000 times larger than the regular penis.

As you can imagine, the quettapenis is an absolute MONSTER.

Its antonym is the quectopenis (10^-30).

Me: I have a quettapenis!
Mate: Nah, you have a quectopenis.

Quettapenis by Lefty Power 123 December 22, 2022