<human>: Summarize the given text in a few sentences.

Like most TIFU posts, this actually happened long before I ever heard of this sub (about 5 years ago). 

I was temping at a place that processes college applications. My friend/coworker, who was an incorrigible flirt, started getting very friendly with a very cute (and very married) female coworker. It was obvious to everyone something was going on, but he was the type to overshare about his conquests and he admitted to me that nothing had happened with her outside of flirtation... yet. 

Our boss was a big, angry, horrendous cunt. She was the epitome of ugly both inside and out. While my friend was out to lunch, our boss was talking shit within earshot about him and the married female coworker. We all had AIM (does anyone even use that anymore?) so I open a window when he gets back to send him a message saying, "Hey, I heard some hateful biznatches talking shit about you and Li-li" (not the actual nickname he had for her, but lets say it's pretty damn close). 

The response was almost immediate, "really who?!?" It was then that my stomach tied up in knots, I could feel myself turning a very bright shade of red, and my world began to crumble. I accidentally sent the message to my boss. She sent me a massage right as I began typing and it placed itself in front of the chat box to my friend. 

I didn't know what to do or say, so after a minute I made up some lame excuse saying it was someone in the break-room talking about her and I was fairly new so I didn't recognize them. Needless to say I stopped at a bar on the way home to drown my sorrows and try to forget about everything. I called in sick the next day, which was true (thanks to the hangover) but really I just couldn't face my boss. I knew she wasn't stupid and saw right through my excuse.

I only lasted about a month before she finally found some random reason to fire me.
<bot>: called boss a hateful biznatch over instant messenger, pussied out and called in sick the next day.