The first thing you’ll notice here is the pronunciation on the t in “get”. Because the next sound /m/ is pronounced with your lips together, we do the same for the t, so it’s as if you’re beginning to make a /p/. Be careful though; keep your lips together and gostraight to the /m/ without letting the /p/ come out. You can practise byleaving a pause between the two sounds, but keeping your lips closed. Listen:
The phrase has the same meaning as “If you see what I mean”. Perhaps a little more informal.