A conversational way to tell your wife or significant other that you had a 'transgression' -- namely, you screwed someone other than your wife or significant other.
Honey, remember that business trip to Cleveland last year? Well, umm, I had a Tiger Woods moment on that trip and now the woman is asking for child support.
Following the Super Bowl 46 halftime show antics by the singer of the same name, M.I.A. is a polite way to describe someone flipping someone else off.
Taylor was tired after a long day in the cube, so when her boss approached her about a drink after work she simply said "M.I.A." and went home.