When someone is saying
something that you have either
A) No clue what the fuck they are talking about, or
B) No interest in it whatsover.
It is basically saying "Shut the fuck up" without offending the
person talking. And hopefully, they
will get the hint and shut the fuck up.
Example A:
"So, if you just take the Rotation
Muffler and place it into the X-axis, then you have a complete circuit."
".............
I see what you're talking about."
Example B:
"So yeah, she lost the
baby, dude. She's heartbroken about it."
"......I see what you're talking about."
"............You're an asshole, dude."