used after one has coughed.

like bless you except for the coughee, not the sneezee.

calm down but for when someone is coughing.
Billy: *coughs*
Jimmy: cough down broski! people dont want to hear your throat being destroyed
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To disguise the sound of the splash while one is taking a shit in a public toilet.
Mark is coughing it down.
by Jamie Skipper June 25, 2008
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