What are the stalks and spits in the American drama "The Big Bang Theory"?

Sheldon was very unhappy because everyone laughed at her, so she and Amy dressed up as Mr. and Mrs. Howard at the Halloween party. Sheldon wears Howard's tights and does childish actions like Howard, while Amy imitates Bernadette with a sharp voice and implies that Bernadette has short legs in the conversation. It broke up with everyone, but at Howard's request, Sheldon went to Bernadette to apologize. Both of them feel sorry for each other because they were laughed at when they were children. Just as they were about to break the deadlock, Sheldon added, "Although I am unusually tall, you are unusually tall ... short."