An acronym for "Realising You Missed Out." This happens when an amazing event occurs, and for whatever reason, you weren't there to witness it, resulting in the sad realization that you have indeed missed out.
After we arrived at Burning Man two days late, we were overcome with an intense case of rymo, as people had already been partying for 48 hours.
by daywalker_redtree October 05, 2014