TITLE: How to pronounce "$\;\setminus\;$" (the symbol for set difference)
QUESTION [8 upvotes]: A question for English speakers. When using (or reading) the symbol $\setminus$ to denote set difference —
$$A\setminus B=\{x\in A|x\notin B\}$$
— how do you pronounce it?
If you please, indicate in a comment on your answer what region you're from (what dialect you have).

This is a poll question. Please do not repeat answers! Rather, upvote an answer if you pronounce the symbol the same way the answerer does, and downvote it not at all. Please don't upvote answers for other reasons. Thanks!

REPLY [2 votes]: In situations such as the theory of automorphic forms/functions, the expression $A\backslash B$ means "$B$ left mod $A$", not set-complement. It is pronounced that way: "B left-mod A".
This is necessary because there are quotients on the right also, which interact with these. It amazes me how much trouble it is to get students to "recover from" thinking that "backslash" could only mean "set complement". I say to them "why not just write '-' for set complement?".
The literature on automorphic what's-its is full of left quotients, notated $A\backslash B$.