What does אז"ר mean?
I've looked all over the place for this word! All I know is that it is apparently a shortening of a city's name, but I don't know which.

Question

Answer

אז"ר is an abbreviation for  אלכסנדר זיסקינד רבינוביץ, a jewish writer. 
An Israeli village is named after him:  כפר אז"ר.

In the IDF jargon, אז"ר means: אוייב זרק רימון (enemy threw a grenade),
a battlecry for when a force is being attacked with grenades.

Answer

http://www.kizur.co.il/search_word.php?abbr=%D7%90%D7%96%22%D7%A8&searchby=abbr&m=1  On this site you can find the expansions of abbreviations.  I don't know whether one of the two answers they give fits your query or not.