Reverse osmosis 

When someone washes their hands prior to shitting but not following

Unfortunately I walked into the bathroom of the restaurant and caught the chef pull a reverse osmosis- apparently he didn't want to get my dinner on his asshole but had no problem with the contrary.

Reverse osmosis by Janet Fupa August 21, 2013

Reverse Osmosis 

The extremely rare process in which a woman actually loses weight after getting married and or having children…

Wow, she looks better now then she did before having the kids !!! Talk about "Reverse Osmosis", that breastfeeding thing really does a body good !!!

Reverse Osmosis by Sombeach82 June 27, 2010

Reverse Osmosis 

The process of osmosis, or learning something while you are asleep, but the thing/person learning is awake.

Fuck this osmosis shit, sleeping is hard. Reverse osmosis is the shit!

Reverse Osmosis by ManguyManguyguyguy October 13, 2020

Reverse osmosis 

When a chick performs a reverse cowgirl on you while your in a jacuzzi.

"Woah dude, she did that reverse osmosis on me last night."

Reverse osmosis by beardedclamm October 31, 2011

Reverse Osmosis 

When you're driving and the person in front of you is following you

Angel: Dude we've been behind this car for 30 minutes
Ray: Maybe we're getting reverse osmosised bro!

Reverse Osmosis by Fuckassdick122 October 18, 2015

Reverse Osmosis Bridge Pylon 

Generational Bridge Pylon Architecture. Built and Created by Non other than CaseOh himself. It can support the heaviest of weights.

"I'm naming that the Reverse Osmosis Bridge Pylon"

Reverse Osmosis Bridge Pylon by JeffyLacePipeandpoopers4297 August 8, 2025

Reverse Gay Osmosis 

The process by which straight male behavior traits pass through a porous cultural membrane in the direction of a gay male friend subject to a hetero-static pressure greater than the homo-osmotic pressure.

Gay males who spend adequate time engaging in activities with their straight male friends become marginally 'less gay' through the process of what is known as "reverse gay osmosis".

Reverse Gay Osmosis by Dr. Sal Rosenpenis January 30, 2023