Flack

Noun

 * 1) a publicist, a publicity agent

Verb

 * 1) to publicise, to promote
 * 2) *1997: he told funny stories about his early days in the theater district, flacking shows up and down the street, but Klara wasn’t listening. — Don DeLillo, Underworld

Thesaurus
advocacy, advocating, antiaircraft fire, bruiting, buildup, cross fire, curtain fire, direct fire, drumbeating, dry fire, file fire, fire, fire of demolition, firepower, fireworks, firing, flak, ground fire, gunfight, gunfire, gunplay, high-angle fire, horizontal fire, interdiction fire, machine-gun fire, mortar fire, musketry, percussion fire, pistol fire, promoting, promotion, publicization, publicizing, raking fire, rapid fire, ricochet fire, rifle fire, shellfire, shoot-out, shooting, time fire, vertical fire, zone fire

Etymology 2
Variant of flak.