Honoré was among five cartoonists assassinated on 7 January 2015, during the shooting attack on the Charlie Hebdo newspaper office.

[3][4] He worked as an industrial designer for the Société Nationale des Gaz du Sud-Ouest, a natural gas supplier.

[3] Honoré had a long career in newspaper and magazine cartoons, working with dozens of publications, including Sud-Ouest,[1] Libération,[1] Le Monde,[1][5] Les Inrockuptibles,[1] La Vie ouvrière,[5] Charlie Mensuel,[5] Le Matin,[5] and Expressen.

With its thick line (somewhat reminiscent of woodcuts),[4][7] and strong reliance on black-and-white, Honoré's style stood out from the other Charlie Hebdo cartoonists.

[8] The last cartoon tweeted by Charlie Hebdo minutes before the attack was an illustration by Honoré of the ISIS leader, Abu Bakr Al Baghdadi, offering formal New Year's wishes.