Um, yes… but the way that you ask I refuse to answer you.

Lazy salespeople and marketers have, for some reason only known to the high mucky-muck of gurus, decided that the assumptive close must be further simplified. Let’s call it the implied close. Here’s a recent example:

I get a phone call from a relative that I’ve not heard from in well over a year. “I’ve got an exciting opportunity that will help you take care of your family for years to come”, he says.
“That’s nice”, says I.
“Times are tougher than when we were kids”, he continues, “we have to prepare for OUR kids future. YOU KNOW WHAT I MEAN?”.
“Sure”, I replied.
“Great, I’ll email a link over to you and we can get started. Just click on it…” (There’s real excitement in his voice).
STOP.

I probably wouldn’t have been so abrupt but early that day I had a similar conversation about making an introduction. It went something like this:

“Do you have direct access to Tom?”, asked the caller.
“Yes”, I said.
“It makes you look important when you interview well-known people. YOU KNOW WHAT I MEAN?”, said the caller.
“YES”, I said.
“When can you introduce me to Tom?”, asked the caller.
Um.

“You know what I mean?” is not a closing technique. It’s a (weak) rapport building question, IMO, as there are much better ways to build rapport quickly.

The lesson of the day? If you don’t want to come across as a cheesy or manipulative salesperson please try not to use “you know what I mean?” as a period to end your sentence.