A maneen was never a man
A maneen was never a man is Irish slang for acting the big man doesn't make you a man.
When ya see a young lad doin' doughnuts on the road ya'd say to him, "Hey, a maneen was never a man."

Welcome aboard, dear thing. Would you like me to translate 'A maneen was never a man' in use for you?
Upon observing a youth performing doughnuts in the public road, one might remark to him: a little man has never yet become a gentleman by posturing.
Any good?
Questions
What does a maneen was never a man mean in Ireland?
Acting the big man doesn't make you a man.
How do you use a maneen was never a man in a sentence?
“When ya see a young lad doin' doughnuts on the road ya'd say to him, "Hey, a maneen was never a man."”
Updated