The verbal 'tic' “you know” often occurs in her speech.
a nervous 'tic'
a facial 'tic'
(..) May I remind you this is blitz chess, A single miscalculation will cost you the game. If tackle the wrong man to the ground, I could start a war. Maybe it's less obvious... A nervous tic. A flutter of anxiety. I'd expect everyone has a reason to be nervous tonight. I don't know. (..)2011 Sherlock Holmes: A Game of Shadows