spray and pray
v. phr.β Β«Itβs a strategic buy.…We have not tried to spray and pray. Because we donβt have a large budget, we put our money in the one place where we know weβll have a large audience.Β» ββRadio Spot Snags Addy Best of Show” by David Knorr Grand Rapids Business Journal (Michigan) Feb. 29, 1988. (source: Double-Tongued Dictionary)