YM' stands for 'Young Men%2C e.g.' This term refers to the organization known as the Young Men's Christian Association, which is more commonly known as the YMCA. The YMCA was founded in London in 1844 and has since expanded to over 120 countries worldwide. It is a non-profit organization that provides programs and services to promote the physical, mental, and spiritual well-being of people of all ages. The YMCA also works to promote social justice and advocacy for those in need.