A slang , sometimes code, word that is used so one does not have to say the word "jew" out loud.
10= j
5= e
w=w
usually used in the prescence of a jewish person, because this term is pretty widely uknown to the jewish population. Originated in Brooklyn and used heavily in the tr-state area due the heavy "10 5 W" population"
This term is another way to use the phrase "That's what she said." in normal convorsation. In most cases, people are made to guess what 10-5 means by listening to other people use it in context because the people using it have serious issues.