I've heard the term "joggers nipple" somewhere around and I have no idea what it is! Does any one know? :confused:

Hi Lime Jelly,
Here you go:

http://en.wikipedia.org/wiki/Jogger's_nipple

Hope this helps. Take care. :)

Sorry, first link isn't displaying right:

http://www.bbc.co.uk/dna/h2g2/A676334