A phrase that signifies that a person's prior remark could have been interpreted sexually while also insulting the (presumably male) speaker. Means that no woman would ever say such a thing about that person because it would be blatantly untrue. If the target of the comment is female, the related saying that's what he didn't say
should be used.
Tim: "Hey man, check out big-ass bag of weed
I scored from Sampson
. Let's blaze
this shit up."
Dave: "Wow, I've never seen one that big!"
Tim: "That's what she didn't say!"
Dave: "Ah, you got me there. I guess everyone knows I have a 3-inch penis."
Tim: "Well, I was just joking, but they do now!"