A phrase used to downplay or contradict a previous statement. I'm kind of busy right now, but hey, I always have time for you. What's up? I thought we were supposed to be there at 8, but hey, what do I know?
phr. a sentence opener used often to get attention and perhaps contradict a previous remark. A: Please don’t track sand all over the restaurant carpet! B: But, hey, it’s my vacation!
See also: hey