about the derivations of 'chook' and 'hoon'!

"chook" is common in many parts of UK as a diminutive for "chicken" - usually used as a term of endearment to another human, rather than to poultry. From other threads, I gather it has the meaning of poultry in many other English-speaking places.

"hoon" - leaves me totally bewildered - but someone willenlighten us, that is for certain!