Hree, it's okay. If you know your DDR lingo, it's kind of similar to that. Don't want to make this a StepMania thread, but it can always be a Topic Wave (Similar to what's on Eminweb):
Speed Mod: The modifier for speed, such as 1x, 2x. It modifies how fast the arrows go.
C-Mod: A StepMania player's best friend. C-Mods are like C200, C400. They set the song to the same BPM, according to the number after the C. No pauses, no speed changes, nada. The common C is somewhere between C600-800.
SDP: Single Digit Perfect. You got somewhere below 10 perfects, but above one perfect. A common achievement to very good StepMania players.
Black Flag: One Great. The rest are Perfects/Marvelouses. A very hated thing.
-footer: The difficulty value of a song.
KBMP: Keyboard Mega Pack. One of the most famous Packs to play online.
Otaku's Dream: Anime pack by Jubo. Very popular for people who hate DDR songs but they still suck anyway.
Hands: More than two arrows at once. Weaker players hate this so they turn it off, giving them a less high combo.
Marv, Perf, etc. Attacking: Trying to get a certain value the highest as possible.
TIMING: Originally a glitch, this mod tells other players you're playing on an easier judge (So you get the arrows easily). It's corrected and barely appears.
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Use whatever format you like. As long as it accepts all fours, you're good. Being able to do well on Healing D Vision Angelic Mix is nice, that song is kind of a tire out on pad (I know, I love playing that song to burn off calories
). Try out some ten footers, borderline ones like Max 300 too.