RO

Racial Oppression. Unfair treatment of a specific ethnic group. See the Holocaust.

Airport officer: (Looks at Indo's passport) I'm going to have to ask you to step aside sir.
Indo: FUCK! That's RO, asshole!

by AnIndo April 11, 2008

RO

Ragnarok Online; a MMORPG released by Koran based Gravity corp, quite often played on by private servers like many games that have gone p2p (pay to play). Many players that play iROSE have at one point played RO.

Wow, RO costs $9.50 a month?

by taikamiya March 07, 2005

RO

1. Random outburst.

2. Uncontrollable outburst of amusement (usually in text form)

3. Used when LOL or LMAO isnt enough

In text conversation:

Kim: I wore a dress over py pants today
Laura: What?
Kim: Yeah I thought is was a shirt
Laura: RO!

by Jane Porter December 04, 2009

RO

real one

Ashley gave the history homework, she's such a RO.

by rcllare January 15, 2018

RO

abbreviation for "Reverse Osmosis." Reverse osmosis is a process in which water is forced to travel through a semipermeable membrane against the concentration gradient by increasing the pressure on the feed side above the osmotic pressure of the solute with the highest osmotic pressure. It is often used in drinking water treatment.

People don't know that the reverse osmosis technology used to manufacture their bottled water does not do a good job removing neutral compounds like arsenious acid (arsenic), even though the companies bottline it would like you to think that it is ultra pure.

by Matt Charles February 16, 2005

ro-ro

ro-ro, slang for coronavirus or covid-19. Although it is an upper respiratory virus, it can be contracted by any humanoid who has been peckerized, or received an oral exam over the past 14 days.

I changed my mind about going down on her, for fear of catching the ro-ro.

by benzvette March 20, 2020

ROS

short for "right on schedule"

"how are we doing for time? think we'll make our ETA?"

"yep, for sure....ROS baby!"

by Bonzai April 04, 2007