“The Rosh Yeshiva said befeirush that no one can stay in the Beis Medrash past midnight.” (Weiser)

“There is a befeirushe ban on smoking in the yeshiva.” (Weiser)

"Heresy. The system was brought down from Har Sinai, as is befeirush in my kid's preschool parsha sheet which depicts Moshe Rabbeinu wearing a shtreimel." (source)