1) An unheralded broadcasting personality.
2) A cynical, sarcastic son of a bitch.
3) A person who hawks their own website, www.williamsvoice.net, to no success.
4) One who lacks self-esteem.
1) What a voice this guy has, it's a shame that he's a real Jim Williams.
2) Why must you be mean, like a true Jim Williams?
3) Mr. Popeil is as effective as Jim Williams.
4) The dead person has about as much motivation as Jim Williams.