Awkward Umbrella
Words used to describe the gesture made by your left hand after a line or series of lines have been spoken that have now resulted in an uncomfortable silence or noticeably awkward moment. The person executing the "Awkward Umbrella" is holding up an imaginary umbrella and moving their head around slightly to try and stay under this imaginary umbrella being blown by the imaginary wind.
Blah Blah made another awkward comment about her imaginary friends. So I whipped out my awkward umbrella hoping not to get wet from her awkward comments.