I need this whole eponysterical thing 'splained to me in wee words.

Hm, that's a good question. I know it's a combination of eponymous and hysterical. It's when the name of a poster is ironic considering what they're talking about.

Er, scarabic said it better: "postings which are funny in light of the poster's user name."

There's a list here: scarabic.net.

Granted some people just think they're annoying. Sorry if I annoyed you! Don't want to annoy the awesomeness that is dabitch!

No matter how hard you try to avoid it, entropy will catch up with you in the end.

Nono, you didn't annoy me - I was just honestly wondering what it meant, or rather where it came from. FRom your explanation (thanks) I had guessed the meaning correctly - but I was suddenly unsure. Where did it start? Some thread I missed, I gather.