"It's Regarded As An Ethnic Slur"
One EPer wrote about liking 'Jap' food. When I PMed this person to let them know the term was offensive and to ask them to change it to 'Japanese', they told me that 'Jap' was the proper abbreviation of the word. I was astounded.
Here's what wikipedia says
"Jap is an English abbreviation of the word "Japanese." Today it is regarded as an ethnic slur, though English-speaking countries differ in the degree they consider the term offensive. In the United States, Japanese Americans have come to find the term controversial or offensive, even when used as an abbreviation. In the past, Jap was not considered primarily offensive; however, after the events of World War II, the term became derogatory."
"Veteran and author Paul Fussell explains the usefulness of the word during the war for creating effective propaganda by saying that "Japs" "was brisk monosyllable handy for slogans like "Rap the Jap" or "Let's Blast the Jap Clean Off the Map"."
"In the United States and Canada, the term is now considered derogatory; Webster's Dictionary notes it is "usually disparaging". In the United Kingdom it is considered derogatory, and the Oxford dictionary defines it as offensive."
However, the article goes on to say that
"In Singapore and Hong Kong, the term is used freely as a contraction of the adjective "Japanese". The Australian news service Asia Pulse also uses the term."
So I can only conclude that this EPer is Singaporean (which are not referred to as 'Sings'), Hong Kong Chinese (which are not referred to as 'Honkies' unless you are Singaporean) or Australian (Do you guys mind being called Aussies?) Or perhaps this EPer is over 80 and fought in WWII.
In international country codes or language codes, the abbreviation is JPN, JP or Ja
I find 'Jap' as offensive an abbreviation as 'eye-tai' for Italian, 'pollock' for Polish or 'chink' for Chinese. We use long terms like 'Native-American' and 'African-American'. Let's just use the whole word 'Japanese'.