Actually, I'm thinking a combination of:
1. Your dangerous, killer nature - aka "cidal properties"
–cide
suff.
Killer: bactericide.
Act of killing: ecocide.
[Middle English, from Old French (from Latin -cīda, killer) and from Latin -cīdium, killing, both from caedere, to strike, kill.]
and
2. The "get out of my way" aspect of Roller Derby, aka step aside
equals
"Stephacide" - which, when pronounced correctly, sounds like "step aside"



