You should be warned that YRN is an acronym that contains some offensive words. We will not be saying it so just use the internet to search for its entirety.
That definition aside, YRN is a mixtape released by the famous Migos rap group back in 2013. It became the starting point of their mainstream careers because of the single “Versace” that topped some charts. It can be used in these manners:
“YRN is a classic but Versace is the most notable section of the mixtape.”
“I didn’t like YRN, especially Versace. Probably because I have heard too many Migos already.