I love when this happens. As a kid we used to go to this restaurant a couple times a year where my dad would order a "drunken ribeye", but I thought it was "drunken Rabbi" until I was 14.
My SO thought "evasive maneuvers" was "a vase of maneuvers" when she was a kid.
My favorite part of when this happens is hearing the person's internal explanation they've been telling themselves for what it means.