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A number that is used to describe really enormous quantities. It has no definitive number of digits, and is not one technical number; instead it is the collectiveness of all numbers that are bigger than the real number that has been brought up just before it. It is often used in much the same way infinity is, when attempting to name a larger amount than one's opponent.

The number derives from the extremely popular podcast, Keith and the Girl (katg.com), during which Keith (one of the two main co-hosts) is known to use the word frequently. It has, from this, spread into common teenage slang.
A: "I'm a million times cooler than you."

B: "No, I'm a trillion times cooler than you."

A: "No, I'm a google times cooler than you."

B: "No, I'm a bubillion times cooler than you!"

A: "Shit - can't top that."
bubillion by bubillionaire December 29, 2010
Related Words
Stay away from bubello
Bubello by Xenier January 17, 2015

bub bubillee 

the act of going feral and/or being a physical menace. (ex: biting ankles, scratching people, growling, etc)
“ let me just go full bub bubillee on some people. just full on bit their ankles and scratch them.”
bub bubillee by potatolive1 June 24, 2022