in one ear and out the other
Quickly forgotten, as in Their advice to her just went in one ear and out the other. This expression, a proverb in John Heywood's 1546 collection, conjures up a graphic image of sound traveling through one's head. [Late 1300s]
Words nearby in one ear and out the other
in nothing flat,
in omnia paratus,
in on, be,
in one blow,
in one breath,
in one ear and out the other,
in one fell swoop,
in one piece,
in one stroke,
in one's,
in one's behalf