noun
jillion
JIL-yun/dʒˈɪljʌn/
An unspecified, enormously large number.
A jillion colorful beads seem to spill from the overflowing chest.

Etymology
Jillion was invented on the model of million and similar number words. It suggests an enormous quantity without assigning it a definite numerical value.
In context
I know I have a good jillion different patterns with this front silhouette but I don't have anything with this back silhouette
More examples
- I've told you a jillion times to lock the door.
- There are jillions of stars in the sky.
- This recipe doesn't require a jillion different ingredients.
Forms
jillion · jillions
Similar words
- zillion
- An equally informal exaggeration, likewise expressing no exact numerical value.
- million
- Names exactly 1,000,000, though also used for exaggerated amounts.