guerrilla marketingnoun.
A marketing campaign that uses non-mainstream tactics and locations, often in defiance of local laws or statutes.
Example Citation:
"College campuses provide the perfect venue for guerrilla marketing which runs the gamut from sidewalk chalking, biodegradable tree postings and stenciling to product give-aways and spray painting logos around campuses since students by nature are open to nontraditional marketing schemes, say experts."
Erik Gruenwedel and Mary Power, "Street Fighters," ADWEEK, August 7, 2000