Looking on the internet deeply has found these results:

are you kiding me is the most popular phrase on the web.

Do you understand me 133,400 results on the web	are you kiding me 110,700,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Sep 27, 2011 ... most certainly means "do you understand me?" "You see me" is unfamiliar to me ( US EN), perhaps they mean "Do you see what I mean?". Ya bYstro gavaryU? Do you understand me? ?? ????????? ????? Vy menyA panimAyete? I don't understand you. ? ?? ??????? ???. Ya ne panimAyu vas. You searched for: do you understand me ( English Spanish ). [ Turn off colors ]. API call; Download a TMX; Contribute a TMX�... Apr 23, 2011 ... Suppose I tell something to my companion and I want to make sure he understands me. I thought I may simply ask "Do you understand me?".	It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

Do you understand me

133,400 results on the web

are you kiding me

110,700,000 results on the web

More popular!

Sep 27, 2011 ... most certainly means "do you understand me?" "You see me" is unfamiliar to me ( US EN), perhaps they mean "Do you see what I mean?".
Ya bYstro gavaryU? Do you understand me? ?? ????????? ????? Vy menyA panimAyete? I don't understand you. ? ?? ??????? ???. Ya ne panimAyu vas.
You searched for: do you understand me ( English
Spanish ). [ Turn off colors ]. API call; Download a TMX; Contribute a TMX�...
Apr 23, 2011 ... Suppose I tell something to my companion and I want to make sure he understands me. I thought I may simply ask "Do you understand me?".

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.