по-мужски

like a man

→ по
phrase Rare #42,762
like a man Used to mean behaving in a traditionally masculine, brave, or responsible way. Often in phrases like “behave like a man.”
RU: Он поступил по-мужски и извинился.
EN: He acted like a man and apologized.

Александр, это не по-мужски.

Alexander, this is not manly.

— Мой друг Иван Лапшин (1985)