mmp, mmp'er

Just noticed these terms the other day in the MPSIMS forum. Can anyone explain what they mean?

Monday Morning Post.

There’s an all-around good guy named RueDeDay who posts something relatively amusing every Monday morning (US Central Time). Then a bunch of losers and rejects (like me, for instance) use the resulting thread to post really miscellaneous and pointless stuff. It keeps my drivel off the rest of the board, anyway. It’s a good deal, and it’s not a hard club to join. You just have to post in the thread.

This week’s thread.

OK, thanks. Actually, I guess I have joined, being not only a loser and reject, but having posted to that thread before knowing what it was all about. I’ll be sure to check it out in the future.