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When a female expunges air from her vagina.
During yoga class, our instructor clam coughed; it sounded like a small trumpet and some folks applauded.
by Halc February 25, 2014
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An action normally associated with hacking up copious amounts of flem, snot or other horrendously disgusting and slimy things.

Not a pretty cough.

Definitely one of those coughs that make you feel bad about yourself after one slips out in public. Kind of like a clam who opens his mouth under water. Only instead of cute bubbles, it's totally heinous boogers
"Smoked a pouch of Bugler in one sitting, I'll have a clam cough for weeks."
by Rod Hamilton November 21, 2013
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