[Magnus]

Right, so I'm back again and this time I'm reading a japanese book and came over some slang I couldn't quite find the meaning of neither through google or dictionaries. it's a ーっちまえ　grammar pattern, although it does seem a bit similar to ーしまう　but I really can't be sure..

here's the whole sentence I found it from やるだけやっちまえ

If anyone could shed any light on the meaning of this piece of slang and also the meaning of the sentence I would be incredibly grateful!