M.O.M.C.
M. O. M. C. is when your brain is on strike and your mouth is doing overtime. It’s what happens when you talk too much and don’t know what you’re talking about.
Bro at the bar: 'I’ve got a life!' (He’s got a bar tab and a broken heart.)
Friend on a phone call: 'I’m gonna be rich!' (He’s broke and still in high school.)
Kid in the classroom: 'I know everything!' (He forgot his homework.)