A frog in ones throat the saying goes,
Most people know what you mean.
But only those people with COPD
Are familiar with something that green.
It's a sign of infection and mucus projectiles
Can come flying out of your gob.
Since you can't hide it but want to describe it,
It looks very much like a frog.
Must be getting old I think
what's the thing that dangles down in your throat called 
Disgusting behaviour in local park.
Throat spasm coughing - the answer
One for the ladies
