dillion

plural dillions

1. excessiveslangAn unspecified large number (of).

   You have like a dillion books here, probably nobody would have even looked at it.

   2014, Lev Grossman, The Magician's Land

   2 more examples

   'The human bean,' the Giant went on, 'is coming in dillions of different flavours. […]

   1982, Roald Dahl, The BFG

   He'd been sitting in the car for a dillion years waiting for his mother to find her glasses.

   2012, Gretel Killeen, My Sister's a Yo-Yo