“He was borur that his roommate was dipping into his snacks.” (Weiser)

“It was borur from his waistline that the bochur was not getting enough exercise.” (Weiser)

"even if it was smeared with vady issur, nowadays it is “barur” that the oils used are completely Pagum from achilas Adam as well as probably Pagum from achilas Kelev and therefore do not present a kashrus concern[3]." (source)