RSO 

short term for:
registered sex offender

Dude if you were to do that you'd be RSO

RSO by JuanBalldez August 27, 2007

RSO 

Regional Security Officer.

Jack Garrett: Mae, I want you to meet with the RSO to get a feel for the situation - on the ground there.
Mae Jarvis: Way ahead of you, boss. I already traded emails with the Regional Security Officer, who gave me the lay of the land and said that there have been - no recent abductions.

RSO by Swapo Völker August 5, 2016

RSO 

Range Safety Officer

Someone certified by the NRA as a Range Safety possess the knowledge, skills, and attitude essential to organizing, conducting, and supervising safe shooting activities and range operations.

Guy 1: Yo bro who is that guy that just yelled at us?
Guy 2 : That was the RSO, hes a pain.

RSO by kuku02 December 30, 2011

RSO 

Real Shit Only. A mindset where in order to achieve one's goals they must focus on the brutal realism of their situation and do what ever is necessary to succeed within their specific situation and achieve their goal.

Masks on. Y'all ready for this? RSO bro lets do it.

RSO by Naastay June 2, 2018

RSO 

Random Song Outburst

They have lots of RSO's in West Side Story.
"Lalalallalalaaaa" = RSO

RSO by ¬_¬ Moo! June 14, 2009

RSO 

Fast car drivin, pill poppin, acid droppin motherfuckers from West Virginia.

Yeah just wait for RSO to show up, shit gon get stupid.

RSO by juulfiend123 April 21, 2019

rso 

Registered sex offender

Don't let your kinds go to his house he is a rso

rso by dallotto May 10, 2023