The act of announcing oneself or adding emphasis to by trumpeting a phlegm-fueled harrumph-pa-rum-pum-pum-pum attack on unsuspecting eardrums.
Thar he blows again! Much to everyone’s annoyance, Captain Phlegm-Ahem announced his presence from behind the cubicle by coughing up a white whale and launching a series of lung biscuits over bow.
Ahoy matey, stick a cough drop in it! Or; better yet, stop being such a Moby Dick call in sick!