] is a supporting character (and sometimes an antagonist) of Spider-Man in the Marvel Comics Universe.
Jameson is usually the publisher or editor-in-chief of the Daily Bugle, a fictional New York newspaper and now serves as the mayor of New York City. Recognizable by his mustache, flattop haircut, and ever-present cigar, he carries out a smear campaign against Spider-Man that has, at least temporarily, turned much of the gullible city against the hero. He employs photojournalist Peter Parker, who, unbeknownst to Jameson, is Spider-Man's alter ego.
Portrayals of Jameson have varied throughout the years. Sometimes he is shown as a foolishly stubborn and pompous skinflint who micromanages his employees and resents Spider-Man out of jealousy. Other writers have portrayed him more humanly, as a humorously obnoxious yet caring boss who nevertheless has shown great bravery and integrity in the face of the assorted villains with which the Bugle comes into contact, and whose campaign against Spider-Man comes more from fear of youngsters following his example. In either case, he has remained an important part of the Spider-Man mythos.
Jameson is also the father of John Jameson, the Marvel Universe supporting character who, in addition to his job as a famous astronaut, has at turns become Man-Wolf and Star-God, and married She-Hulk.
Jameson was raised by his uncle who was also his stepfather. This is who he learned to love cigars from. His biological father J. Jonah Jameson Sr. left the country for unknown reasons.
All of this is just a cover for Agent Triple-J of the Men In Black. He knows perfectly well that Peter Parker is Spiderman and is merely using him as a scapegoat in his job of spinning out misinformation to mislead his own people off the trail of the truth.