At one time I was an active trader among the collection of internet blogger community (until eventually just focusing on The Bench for my trades), and one term that is well known there -- to be "Bipped" -- is approaching its 10 year anniversary. It's one of the most feared (and most hilarious) occurrences that a trader could experience:
http://thorzul.blogspot.com/2010/01/assignment-reach-out-and-bip-someone.html
It's been several years, but I too was a victim of an anonymous "Bipper" once:
https://mmmrhubarb.wordpress.com/2012/12/20/merry-bipmas/
May all your trades be Bip-free (except, you know, for the ones you actually wanted)
http://thorzul.blogspot.com/2010/01/assignment-reach-out-and-bip-someone.html
It's been several years, but I too was a victim of an anonymous "Bipper" once:
https://mmmrhubarb.wordpress.com/2012/12/20/merry-bipmas/
May all your trades be Bip-free (except, you know, for the ones you actually wanted)