Gajillion:
A large, undefined number.
Could refer to several, or a massive amount.
Used in extreme over-exaggeration for humorous or emphatic purposes
Me: there's like a gajillion stars, we're so infintesimal.
Friend: dude, infintesimal isn't a word
Me: yuh huh. *nods*
Friend: STFU and pass the pipe PLZTHX