If you are new here please read this first.
If you think that the phrase “You know what I mean?” doesn’t warrant a second glance and is one of those overused phrases that one should rather eliminate from one’s vocabulary – you’d better think twice!
This expression allows us deal with situations when we’re stuck for words and we just can’t finish off a sentence, for example. If you think it’s better to say nothing and just stare at your conversation partner than say “You know what I mean?” – good for you!
Personally I will go for “You know what I mean?” over an awkward moment of silence any day, and while this phrase can indeed be overused if you get into the habit of saying it after every sentence, it’s still a great way of implying that both you and your conversation partner know what you’re talking about anyway, and any further explanations can be omitted.