A Jillion 

A fictional numerical term used to describe an unusually large number or amount.

Smaller than a 'Ka-Jillion'

"There's like, a jillion stars in the sky..."

A Jillion by Everfalling November 21, 2004

A Jillion 

Not a real unit of measure. Often used to exaggerate.

I had to write, like, a jillion-page essay! Due tomorrow!

A Jillion by Rodney Basil May 19, 2004

a jillion 

a term used by cool people who don't care that it is not a real term. Used to refer to an exaggerated amount of something when "a million" and "a billion" does not seem to do the vast amount justice. Also see a zillion and a kajillion.

1. OMG! How long has it been, baby? It felt like a jillion years!
2. Trust me, I've done this a jillion times.

a jillion by happyjoy July 12, 2004

Pulling a Jillian Manfredi 

When you stick your penis into a girl and she says "your penis is inside my hole omg omg what do I do" then she rides the penis for 13 minutes in a circle while keeping it in.

Jack: Did you hear about Kaylyn?
Ryan: Yeah she pulled a Jillian!
Jack: OMG i know she went for 13 minutes!!!
Ryan: Damn I want someone be Pulling a Jillian Manfredi on me ;)

Pulling a Jillian Manfredi by Taylor Feiglson August 1, 2012