bajillion
n an extremely large but unspecified number, quantity, or amount: They'll sell a bajillion of these.
determiner amounting to a bajillion: a bajillion dollars.
[C20: on the model of million, billion, etc]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014