Define I Know What That Means Meaning

A verbal prank commonly used by in a conversation, with the intent of annoying the listener. In this prank, there are two parties having a conversation: person A (the pranked) and person B (the pranker). Person A makes a simple, innocent remark with no double meanings. Person B initiates the prank and replies, "I know what THAT means" (note the emphasis on the word "that").

The prank is that person A begins to feel insecure or uncomfortable about what they have said, because the phrase, "I know what THAT means" gives the impression that person B misunderstood what was said (i.e. thinks it has a sexual meaning, or thinks they're lying about something). Person A is completely unaware that person B is just trying to annoy them.

After this, person B could proceed to only say, "I know what THAT means."

A variation of "that's what she said." Usually expressed with obvious knowledge, but in fact, they are taking your words completely out of context.

A phrase used by anyone who knows it. which displays a "I don't care, but i do at the same time" feel when its said.
The X can be replaced with anything, but depending on what X is changes "what" and "means", if its a person, it would instead be "who" and "is".
Usually saying this phrase, they put on a depressed tone and slur their words, specifically "sounds", and "disappointing". Usually said like : "Soounds Disappoooointingg..."

This phrase is tagged to the end of one's speech in order to reveal an innuendo or undertone. It is expressed with a wide-eyed expression and a tone of confusion. It is often synonymous with "That's what she said".

Unlike "That's what she said", it is proper for one to add this phrase to the end of his/her own speech, as well as for others to do the honor for him/her.