pile on verb 4pile-on noun 1forms 5 verb4 •To jump on top of someone or something quickly.As football linebackers pile on a quarterback in a blitz, the newspaper editorialist heaped sarcasm onto the president. — 2006 •(figurative) To criticize someone or something in a concerted effort; to add on some additional critique.OK, OK, they've already gotten the constructive criticism. Now you're just piling on. •(informal) To add or apply in great quantities. •(figurative) To unnecessarily extend the margin of a winning score. pile-on noun1 •An argument or fight in which one side is greatly advantaged by being more numerous or more closely allied than the other side.A social media “pile-on” against anyone who criticises Sinn Féin does not aid or assist the party, its housing spokesman has said. — 2020 formspiled on · piling on · piles on · pile ons · pile-ons