1. The act of insulting someone via a reference to an embarrassing event in their past. The term was popularized by a scene in "Goodfellas" in which Billy Batts admonishes Tommy DeVito for his subservient childhood job by exclaiming "go home and get your f**kin shinebox."
2. Attacking someone for previous shameful actions, giving the impression said acts are indelible.
Mike opted to avoid attending his high school reunion, knowing they'd remember his loss of bladder control in gym class and be shineboxing him all night.
A way of saying you knew somebody back when they pissed their bed, kind of like they knew you back when whined to your mother or father about getting somebody kicking the shit out of you.
When a man will search for hours to find something that is laying out in the open on a table. Items are often easily found by a women.
Man: "I have been searching for hours for keys."
Woman: "You mean the ones sitting there on the coffee table?"
Man: "Where?"
Woman: "Right there in the middle of that table."
Man: "oh, must have been Male Pattern Blindness"