a real man would (shut up and) ...
A set phrase used to suggest that a man should act decisively or stoically without complaint, often followed by a verb. Can be used humorously or to evoke traditional masculine ideals.
A real man should shut up and get the job done.
Like a real man, he silently put up with her selfishness.
Variant using 漢, which carries a more rugged, masculine nuance.
A set phrase combining 男 (man) with the te-form of 黙る (to be silent). The exact origin is uncertain, but it reflects a stereotypical masculine ideal of stoicism.