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

Hydrodynamic 

The act of moving swiftly through water.

A terd that disappears in your toilet is a good example of a hydrodynamic mass.

Hydrodynamic by kdawg_2343 January 1, 2008

Hydro dream

When an instance of sexual excitment occurs in one's sleep, it may cause one to spurt. If the spurt released is a small one, it is merely a wet dream. If you need to pressure clean your blankets afterwards, it is a hydro dream.

Man, I almost drowned my mother in that hydro dream.

Hydro dream by Benjamin "Benny" Dover May 19, 2009

hydrodynamiccockthruster 

A hydrodynamiccockthruster lurks in the shadows of the night, thirstfully awaiting his victims as they unsuspectinglly stroll past. He is a hunter and gatherer, a saint amongst feeble minds. Arched back ready to pounce with erect cock holstered at the ready.

Yeah aunt flossy i do concider myself to be a hydrodynamiccockthruster and if i wanted any lip from you id open the fly of my denim jeans!

hydrodynamiccockthruster by TheREAL-PhatKiddy February 15, 2018

Hydrodynamicity 

How hydrodynamic a thing is.

My balls have more hydrodynamicity than my hair.

Hydrodynamicity by Koppier May 22, 2024

Hydrodynamics

The study of fluids (liquids and gases) in motion, and the forces acting upon them. It's the science of flow, pressure, drag, and turbulence, essential for designing everything from submarines and aircraft wings to arterial stents and planetary weather models. In an alien context, it expands to "xenohydrodynamics," modeling how strange fluids—like liquid methane on Titan or supercritical carbon dioxide on Venus—behave under different gravities and temperatures. It answers questions about alien ocean currents, atmospheric circulation, and the design of vehicles meant to navigate non-water seas.

Example: Engineers using Hydrodynamics to design a silent submarine drone for exploring Europa's subsurface ocean must model how its shape interacts with salty water under immense pressure and near-freezing temperatures. An astronomer simulating the hurricane-force methane rivers flowing across Titan's surface is applying hydrodynamic principles to an alien fluid system.

Hydrodynamics by Abzugal Nammugal Enkigal February 3, 2026