During sex. The amount of time that passes between when I come and you leave!
Man, that chick from the food stamp office came over last night, but it seemed like an infinity passed before she left. I had to eventually tell her to kick rocks!
The only incomprehensible thing made by humans. It's not a number, it's a concept. Also what 6 year olds do to flex their knowledge and the worst thing you could say to a googologist.
First Example:
6yo one: Hey I know a really big number
6yo two: What?
6yo one: a trillion!
6yo two: I know a bigger number!
6yo one: What number?
6yo two: Infinity! It's bigger than every number.
6yo one: but what about Infinity plus one?
6yo two: Still Infinity!
6yo one: wtf you talkin
Second Example:
Idiot: hey aarex!
Aarex Tiaokhiao: what?
Idiot: I know a number that is bigger than every number you "invented"
Aarex Tiaokhiao: don't tell me it's...
Idiot: Infinity!
Aarex Tiaokhiao: (slaps his forehead as hard as possible)