ps stands for

38. bbm for windows 8 laptop P. lirik i live my life for you S in e-mails is used exactly the same as P S in normal letters It is short for the Latin post scriptum, i e written after the main script As such, it is written at the bottom (end) of the main script (main e-mail in this case), and generally contains information which is trivial, or tangental to what was just said