I hear it all the time and it irks me everytime I hear it:
Do you know what I mean?
And it seems to me that habitual users of this phrase pepper their conversation with it at least every 3 or 4 sentences.
Look, if I don’t know what you mean I will ask! Ok, f**ktard?!?
But I’m lame, ‘cos everytime I hear it I just grit my teeth and go: