A set of rules governing the allocation of beds and the affairs of mating. Where a dude friend has pulled a female on a night out but has no suitable planned venue to engage sexual intercourse with said female, they may invoke this to secure a Host friend’s room and bed for the night.
Kent1: “Who is that?”
Kent2: “Oh, that’s Nat. I hereby invoke Neptune Protocol on your room. Last time I did it in your lounge I got carpet burn and dust mites.”
Kent2: “Oh, that’s Nat. I hereby invoke Neptune Protocol on your room. Last time I did it in your lounge I got carpet burn and dust mites.”
by JizzClown May 7, 2018

John Brown: "Careful Martha! If you eat all that seafood sampler you will be sprayin Neptune's Bisque out yer ass in the morning!"
Marthe: "go fuck yourself JB, you hear me? Go fuck yourself!"
Marthe: "go fuck yourself JB, you hear me? Go fuck yourself!"
by Dr. Centaur April 14, 2015

From spongebob. Mr. Krabs uses this phrase a few times throughout the episodes in the show. Basically means “what the heck”. Also can be used in place of “wow”.
*hears loud noise*
Neptune’s trousers!!! What was that?!
Neptune’s trousers!!! That cat got really high up in that tree!!!
What the Neptune’s trousers is going on here??
Neptune’s trousers!!! What was that?!
Neptune’s trousers!!! That cat got really high up in that tree!!!
What the Neptune’s trousers is going on here??
by Pipperoo October 15, 2017

Neptune’s Revenge is when cold water reaches a male’s genitalia as he is walking into a body of water
The man walked on his tip toes for as long as he could to avoid the icy embrace of Neptune’s Revenge
by Wangwapper August 5, 2018

I went to do my business, sat on the toilet and got a Neptune's Embrace the water was so cold I jumped right back up.
by TellTail September 11, 2019

by i hate niggas October 5, 2020

A Neptune's kiss is the splash of water that touches your butt after pooping in the toilet. The Neptune's kiss is basically your shit kissing gou goodbye
"took a dump so big I didn't even need to clean myself afterward: the massive Neptune's kiss resulted did the job"
by AuroV February 10, 2018
