Hydroskeet 

When you are in the bathtub and are jacking off, but you are too lazy to get up so you skeet in the water inside the tub, which you are laying in.

I got horny in the tub yesterday, so i jacked off and before i knew it i hydroskeeted and was swimming around in my own cum.

Hydroskeet by HammboSlice10 November 30, 2009

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