Dear Flim,
You are a conniving, two-timing son-of-a-whore. No, really, I heard your mother was a whore. When you're done having a relationship similar to what Applejack has with Big Mac with your brother, Flam, try doing some real villaining for a change, you bedazzled nutsack.
Yours sincerely, Discord
My suggestions for insults include:
Nyx
Fluffle Puff
and Scourge the Hedgehog.
Not sure why I added the last one.
img3.wikia.nocookie.net/__cb20110609163507/gyropedia/images/e/e8/PinkieShrug.png
DID
YOU
JUST
pinkie.ponychan.net/chan/files/src/133509894793.png
4359248
Huh, I thought I replied to this!
I will not lie; that part was inspired by your story.