[quote=@Feisty-Pants]
<Snipped quote by Saltwater Thief>

...I've never heard that expression. The heck does that mean?
[/quote]

It's a Japanese idiom. The full thing is "The frog at the bottom of the well knows nothing of the vast ocean." Grey has it though, pretty much "Being big where you come from does not make you big."

Vocab ain't never had a "friend" like me >=)