xmas
Xmas is the abbreviation of Christmas.
it is an abbreviation for Christmas 'aka Xmas'
"adj" is the abbreviation used for the word "adjective".
DE is the abbreviation used for Germany in print and Maps ! This is the main thing you will see this used as.
The abbreviation "ph" is commonly used in text messaging and online communication to mean "personal hygiene."
OBG may mean obstetrics and gyncology. In the US, OBGYN is a more commonly used abbreviation for that specialty.
R/S is a medical abbreviation sometimes used to mean relationship. It's not very commonly used.
inst
nocturne
christ
This abbreviation most likely stands for "Party and Play" when used in a personal ads,though it can mean "Plug and Play" when used to talk about technology. The abbreviation PNP when used in personal ads usually refers to the use of Crystal Meth.
Christmas is only an abbreviation of Christmas. It means exactly the same as Christmas and has no other meaning. Please see the Related Question, below, for more information.