You f*cked up.  We're not talking a typo or using they're instead of their (although, please, PLEASE, don't do that). Not just a small accident, a big one that majorly impacts your team and those around you. No, you my friend really stepped in it, screwed the pooch, blew it big time, effed up.

It happens to everyone eventually. And it will happen to you. Despite your best intentions, you will mess up at work eventually. Either by screwing up a project, forgetting something crucial, or by the many other ways one can make a massive mistake. It is going to happen. The important thing to manage is how you handle the aftermath.