The result of an awkward situation in which the topic is misunderstood or ignored by the other person. Signalled by the joining of thumbs, extension of fingers to create a bird like shape, raising them over one's head, making the sounds of a crow.
A Boy and Girl are sat together:
Boy: It wouldn't make any difference if I ate anything off your body, you're so flat chested it'd be like eating off of the table.
Girl looks vacant. Boy signals the Awkward Crow...