peen /piːn/noun 2verb 1forms 3 noun2 •The (often spherical) end of the head of a hammer opposite the main hammering end. •(slang) Penis.With all due respect (and that may be very little), the real truth is that being a dad is sometimes an imposition of pain far worse than any up-the-peen catheter could ever deliver. — 2009 verb1 •To shape metal by striking it, especially with a peen. formspeened · peening · peens
