Oratory Spackle

ME.
someone who fills conversation or quiet pauses until someone more interesting arrives.

Oratory Spackle

Sue: How are you, you don't look so good. How have you been feeling?

Me: Well, actually I have kind of a bad headache this morning and I have been feeling kinda.....

(someone more interesting walks in the room)

Sue: HEY GIRL, GOOD MORNING!!! HOW YOU BEEN?!

.. then i leave the room.

Also, can be useful at parties. I arrive early and stand around talking about movies or reality tv, until more important guests arrive.