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."
Dwight (person A): Hey man, I just remembered, that new Eminem album is out today! Wanna go get it?
Jim (person B): I know what THAT means...
Dwight: Um, what do you...think it means?
Jim: I know what THAT means...
Dwight: **quizzical look on face** um, all I asked was, wanna get the new Eminem album...?
Jim: I know what THAT means...
Dwight: **getting kind of annoyed** do you wanna get the new Eminem album or not?
Jim: I know what THAT means...
Dwight: **more annoyed** what does it mean?! Eminem album or not?
Jim: I know what THAT me--
Dwight: **angry** WHAT? WHAT?!
Jim: I know wh--
Dwight: WHAT DOES IT MEAN??!! WHAT??!!
by A Person Named February 1, 2014
a phrase used to make sure the other person in a conversation is listen and can comprehend. Usually followed by a laugh, or a "Hear what im sayin?"
Yesterday i met this tease, know what i mean
by gravey November 13, 2004
understand what i'm saying?
Danny(A prisoner currently serving a life sentence at barwon maximum security prison):
"i had a bad attitude, i wouldn'a listened to no one, nah i mean? Yanah i mean?"
Kids:"Wtf does he mean?"
Narrator: So the gripping story ends, with Danny being raped from behind in the butt hole for cigarettes by Butch Casidy. So the lesson hear is kids, don't say you know what i mean, especially to Butch Casidy, AKA The Backdoor Banger from Box Hill. Stay tuned for another gripping story by the back door banger"

by Jordan GL January 29, 2007
A common phrase, that if added to the end of any simple sentance, can make it sound dirty.
I'm gonna go scuba diving tonight, if you know what I mean.

I'm gonna make the bed, if you know what I mean.

We paid the bills the other day, if you know what I mean.
by Samantha May 10, 2004
Phrase used by the inarticulate and dimwitted as a comma and to buy time and cover their lack of knowledge of a subject on which they have decided to speak and the resulting insecurity this engenders.

It is particularly irritating in sportspeople, presenters and commentators as they are paid way in excess of the average salary of their audience precisley to tell them what it is they mean. The unspoken assumption is that the audience are already well aware of the 'gem of wisdom' or 'fact' (or see cliche) imparted by the 'expert' and that there really is no need to pay him or her £5000 an episode to provide such insightless insights.
Well, burumble balarumbler schumacher clam clam diddly pitstop gloomer. Knowarramean?
by Dazzla October 3, 2003
a communication tactic commonly used among close friends to clarifly that they are on the same wave length.
One friend to another: "I would go but I don't feel like being the third wheel, you know what I mean."
by Anonymous October 3, 2003
Usually added to a sentence that makes absolutely no since but makes it sound like its a common phrase. Over all makes everyone really confused.
I too like to shake a bag of old wrenches if you know what I mean.
by Don't paniccc May 22, 2016