Hi JR: Your not being dumb, you just don't know, its all good, "Om/OM" is a man (old man), "YL" is a young woman/girl (young lady) and a "XYL" is a woman (ex-young lady). These left over short cuts from the telegraph, morse code (CW code word) era, saved the Op(s) a few dots/dashes. Take care my friend, YC.