Hydrogina 

a quick influx of water rushing into the vagina.

Karen uses the shower head to masturbate so she'll have a hydrogina

Hydrogina by Dr. Elizabeth March 21, 2011

Hydrodynamic 

Being able to move quickly on water.
ie. having a flat chest

She is very Hydrodynamic

Hydrodynamic by JayRizuri November 28, 2020

Hydrodynamic 

The severe lack of boing boing only known by gura

Theres a reason im not BOING BOING , it comes down to science , i am hydrodynamic

Hydrodynamic by The illusive mr mepz January 20, 2021

Hydrogen-Sulfide 

What be makin farts stank.

Hydrogen-sulfide is what be makin farts stank.

Hydrogen-Sulfide by LidaMif March 19, 2010

Hydrogen oxide 

A scientific word for water. H2O. Not to be confused with deuterium oxide, which is heavy water (D2O).

A: I filled these ballons with hydrogen oxide.
B:What's that?
A:It's water.

Hydrogen oxide by HawaiianPunch1 July 31, 2010

hydrogen hydroxide 

The term "hydrogen hydroxide" means a hydrogen ion (H+) bonded to a hydroxide ion (OH-). when you put those together, you get H-O-H, which is of course H2O, which is water!

Dude, I need some hydrogen hydroxide!

What?

Hydrogen hydroxide. . . . You know? A hydrogen ion and a hydroxide ion bonding? H2O? WATER?

OOOOOOOOOOOH.

hydrogen hydroxide by Ubiquitousian April 15, 2011

di-Hydrogen monoxide

a substance that sounds creepy, but if you write the formula out, think again...

Bob: di-Hydrogen monoxide is gonna destroy the world

Joe: idiot... (takes a large gulp of water)

di-Hydrogen monoxide by dab52 January 1, 2012