Actually, there's already a knife that you are asking for... it's the Swamp Rat Bandicoot & Inficoot. Closest thing we will probably ever see anyways, considering Swamp Rat isn't doing Res-c and I doubt Scrap Yard is going to offer a knife design that is from Swamp Rat.
Hmm. Add probably a half inch of blade height, maybe add a little more pronounced belly and Magically you got a Mini Half Trash, or MHT!
Now once again add about 1/4 inch blade height, get rid of some belly, make the blade a more continuous curve from handle to tip (make sure it has the Mini Tali “tip”) and again, You got a Mili Tali-Whacker or the MTW!