In the context they (my minor league coaches) used it, it meant body checking. Generally it was with regard to still hitting the guy if he got rid of the puck, if you already had him lined up, or anywhere reasonably close to it.
There seemed to be an unwritten rule that you could hit the guy fairly late if it was clean, not excessive, and the guy getting hit is aware it's coming, similar in some respects to current calls in the NHL, where you see hits regularly, 3 + seconds after the change of possession in some areas of the ice.
That sounds right, that usually was accepted and expected. Speeding up, leaving your feet, and getting a stick up wasn't. Somewhere that crept in. When I played you could square a guy who just passed the puck, even a bit late if he could protect himself. Penalties and problems ocurred when he couldn't. Talking low level midget hockey. Coach always told me to follow through even to just rub him out of the play. You got some grace if the opponent seen it coming. Same thing on the other end. Got hit alot after passing the puck but knew it was coming and if a clean hit no call and didn't expect one, and I got hit a hellva lot more then my slim frame could dish out.