Hydro Seed 

To cum all over someone in the shower.

Damn! You should have seen how I Hydro seeded that bitch last night.

Hydro Seed by Scorpiocum August 7, 2020

Hydroseeding 

Masterbating in the shower.

The new handheld showerhead that I bought makes hydroseeding in the shower wicked awesome!

Hydroseeding by FatdogTavern April 21, 2016

hydroseeder 

Someone who masterbates in the shower.

He was a classic hydroseeder and he sprayed his seeds upon the shower wall with groaning glee

hydroseeder by FatdogTavern March 21, 2016

Hydroseeding 

To ejaculate onto a woman's back after fucking her doggy style, such that the semen forms perfectly aligned rows.

Girl 1: Have you noticed that there are 3 perfectly aligned stains on the back of your shirt?

Girl 2: Yeah, my boyfriend hydroseeded me.

Girl 1: Ah, hydroseeding, that explains it.

Hydroseeding by dd_slayer June 13, 2013