It's a plugin for Chicken Flavored Water that some people use to cheat with Monster Hunter.
It can be used for more useful things though, like displaying more blood in Unite from low, medium, to strong (like in P2G.) The ability to save in more than one slot, change your appearance and gender, and display monster health is possible as well.
It's also useful for changing the CPU speed in-game, displaying FPS, and using a simple text-reader.
It's laughable that a whole squad of 'MHvets' and 'Gentlemen' alike use CWCHEATS. I made a topic a while ago when 2G came out about how seeing a monster's health can ruin the game experience. I was bashed, trolled, flamed by the same 'vets' as they call themselves today.
To all CWCHEATERS: You want to cheat, fine by me, but don't try to make petty excuses for doing so.
carriers are synonymous with instantaneous-winination - parrot_of_adun