|さあ||- Come; come now: right|
負ける - まける - To lose; to be defeated; to succumb; to give in; to surrender; to yield (this is in the informal negative form here)
ぞ - (sentence end) adds force; indicates command
気違い - きちがい - madness; madman (within this context)
共 - とも - (Suffix) (Usually written using kana alone) both; all; neither; none (in this case, this indicates that there is more than one person being addressed, affixing 共 to other people is disrespectful compared to 達 (たち, -tachi).
Right, come on then! I won't lose, you madmen!