"Shameless plug" refers to when someone promotes or advertises something they are involved with, without feeling embarrassed or guilty about it. Full definition
A hypothetical $ 3000 will maybe get you a month or two of PR if you negotiate (insert shameless plug of Vicarious PR here). (vicariouspr.com)
We don't normally believe in shameless plugs but here at the Credit Repairmen, our free credit evaluations walk you through exactly how your credit reports work, and what you can do in situations where your credit score is unfairly holding you back. (thecreditrepairmen.com)
Be sure to visit Kim Bernard's solo exhibition in the front gallery and (insert shameless plug here) a peek into the back room, where the work of gallery artists, including my own, is on salon - style display. (joannemattera.blogspot.ru)