yom stands for the year of me, as this is undoubtedly the year of my greatness. only applicable to women.
Girl #1: "This year is gonna be sick. it's yom baby."
Year of my dick
2019 is all about the sexual liberation of women, hence Yomod Lacheim can be used as a way to express this newfound freedom
Girl #1: "Joe is so fucking annoying. I'm going to break up with him."
Girl #2: " Yomod Lacheim baby!"