Used originally for people using the website goeyeball.com to price monitor items and save money during the recession of 2009. A more broad definition as someone who knows how to save and keeps an eye on sales.
1. Idiotic, stupid, not too clever.
2. Insane, crazy.
"“Clark: I think you're all dicked in the eyeballs. We're ten hours from the fucking fun park and you want to bail out. Well I'll tell you something. This is no longer a vacation. It's a quest. It's a quest for fun. You're gonna have fun, and I'm gonna have fun... We're all gonna have so much fucking fun we're gonna need plastic surgery to remove our goddamn\ smiles! You'll be whistling 'Zip-A-Dee Doo-Dah' out of your assholes! I must be [crazy! I'm on a pilgrimage to see a moose. Praise Marty Moose! Holy Shit!
banking term; used to describe a situation where you make a guestimate by looking at it (eg. a stack of change or wad of bills) and being precise about the amount.
Dude! That's $536.78.. whoa, I'm right! I totally eyeballed it!!!