defectionist (dɪˈfɛkʃənɪst) n a person who is in favour of lapsing, backsliding, or defection Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014 ...
Defection to England by McCoist the pundit.Jardine, Peter