Oy, You are either a Zoya or a Roya who is trying the remove the last and first letter of your name tik tok trend, but don’t find an an interestingdefinition. You probably have a crush on Timothee Chalamet
OY is a better, calmer, less boomer version of PS.
It means "Oh yeah..."
As in, I want to tell you this other thing that belongs in the email, but it is not really related to the email, so I am going to jam it in at that bottom.