“We hosted a fifteen year old bochur for Shabbos.”

"You did your Hebrew school homework before it was due? You’re turning into a regular yeshivah bocher." (JPS)

“He is as gentle as a yeshiva bokher.” (NJY)

“He has about as much knowledge of girls as a yeshiva bokher.” (NJY)

“Don’t ask him for an opinion; he’s a yeshiva bokher.” (NJY)