It's an uncommon contraction, also at first glance, it reads like another word, one that refers to someone who offers professional sexual services.
Yes, and perhaps more interestingly, what will it look like 500 years from now? Many common modern words that we assume to be self-contained turn out to be pastiches of two or more older words. Like "shire reeve" -> sheriff.
Well I'll be. That is so cool. Thanks!
http://www.etymonline.com/index.php?term=sheriff&allowed_in_...
Edit: Allow me to repay in kind. Did you know that rhubarb is called "rhubarb" because the Greeks thought only barbarians would eat it?
http://www.etymonline.com/index.php?term=rhubarb&allowed_in_...