I thought all you plumbing experts out there might enjoy this item from World Wide Words
********************************************************************************** PLUMBER'S CRACK Subscribers clearly have a low sense of humour, in two senses, as my passing reference to this new entry in the Oxford English Dictionary online generated more comment than anything else last week. Other expressions for this artisanal anatomical feature were "plumber's cleavage" (and "brickie's cleavage"), "refrigerator repairman's bottom", and "electrician's butt". An Australian tells me it's known there as the "coin slot", as with vending machines - I wonder what you get if you try it? Another Australian knows it as "builder's smile". Paul Warren, at the University of Hull, told me of "backal cleavage", "backal" being an invented colloquial term, the opposite of "frontal". Roxane van Beek explained that a Dutch equivalent is "bouwvakkersdecolleté", which translates into English as "builder's cleavage". *******************************************************************************Aspasia