Literal translation
You have understood me!
Meaning
you've understood me
Explanation
This exclamation, made famous by a well known historical use and since taken up with amused irony, asserts that a message has gotten across without needing further elaboration, the listener being expected to grasp its full meaning, including whatever remains unspoken. Literally it merely states that the other person has understood, but in everyday use it mostly serves to close off an allusion, an innuendo or a double edged joke, signalling with a knowing wink that nothing more needs saying. The trailing, rising intonation described in context, paired with a wink, is part of the expression itself: without that particular delivery, the phrase loses its effect. The register is familiar, often playful, used among people who know each other or to punctuate a remark with a slightly risqué or teasing undertone, in a pure spirit of complicity.