The last name of Jack Donaghy, a character on 30 Rock. It is also a common name of large frogs bought in Boston...
Donaghy is a 51 year old GE executive that went to Princeton University and was a member of the Twig and Plums Society.
by Ultimate 30 Rock Fan April 25, 2010
to "Donaghy" a game means to referee, umpire or otherwise offciate a game in the favor of a placed wager or bet.
by Jonathan Ainslie August 21, 2007
by Dirtybird August 17, 2007