do you know what I'm saying

Pronunciation
Often the composite of the constituent words, but see also the usage note.

Usage notes
In sociolects that use this term frequently as an interjection with function equivalent to that of or  (including but not limited to ), it is often substantially contracted and clipped, even to the point that  learners might have difficulty recognizing it when they first encounter it, such as /ˌnɒmˈseɪn/ or similar.