Here is the sentence containing the word.
おことわりだね おまえみたいな 弱{よわ}っぴいと組むなんて!
やるんなら おれひとりでやらあ。
In my opinion, I think it would be transformation of the word 弾き or 'player' but I'm not uncertain if it is correct because the word ends with 「い」. I have searched on some dictionary sites but there is no one describing about it.