comper
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Related to comper: camper
comper
(ˈkɒmpə)n
(Games, other than specified) informal a person who regularly enters competitions in newspapers, magazines, etc, esp competitions offering consumer goods as prizes
[C20: comp(etition) + -er1]
ˈcomping n
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014