"Didn't I tell you, sir, that she was a cough-drop," rejoined Parsons excitedly.
"Come and hand me my bag, I want a cough-drop," she said to Lynn that day, yawning.
To expect a pill and receive a cough-drop is by way of being a sort of disappointment.
cough drop n.
A small, often medicated and sweetened lozenge taken orally to ease coughing or soothe a sore throat.