A wight is a incorporal undead beeing that drains the essence of living beings to stay alive. Wights are usualy controled by someone or thing of highter power such as a necromancer.
It is the original word in the expression "mighty wight of you" which literally means "mighty human of you" and has been erroneously represented by changing it to "white" and associating a racist connotation.
Taken from the title character of Homestar Runner.com, "wight" is the pronunciation of "right" derrived from Homestar's speech impediment causing him to pronounce his R's as W's.
a common phase used by ginger people, usually fat with problems of there voice. it has recently been discovered as a acknowledgement of awareness that there freinds are around as we would say heya or hello