When a person who thinks they are an expert on something or already knows something gets mad because somebody is pointing out something to them that they already know.
"Did you know that the cloud was back up on the system?" "Of course, why are you telling me? I can see the logs." "Jeeze, you didn't have to gleekrant at me. Cut back on the coffee."
building up saliva in the salivary glands using some stimulus, like sour food or yawning, and then pressing the tongue upon the glands, causing the saliva to shoot out, usually at an impressive distance.