I was brought up that bush league type stuff showed a lack of respect for the game, the opponent and an admission that you couldn't win the game straight up without bush league play. To be told you did something bush was a huge slap in the face.
Gotta disagree with PG about Arod's yelling and slapping at the ball. That has been bush league since forever for any player. If you condone those type of actions then you pretty much allow pitchers to seriously headhunt when that guy comes to bat next time.
Same thing as blindsiding a catcher waiting for a very late throw when the runner had plenty of time and room to slide but instead chose to nail the catcher; saw Fielder do this two seasons ago. Total cheap shot. Really more of a dirty play than bush due to injury factor. If a catcher tags someone hard in the face or drops his shinguards on a runner that has scored everybody gets up in arms saying it was bush/dirty play. Rose/Fosse not bush as it was a real close play but Rose did have room and time to have slid and score. Absolute shame about Fosse getting injured in basically an exhibition game; had a very bright future ahead of him.
Even today I see HS coaches do what we used to call bush such as running between the pitcher/catcher during warmups as he heads out to 3rd base coach's box. When I played any coach that stupid would get buzzed by the catcher the next inning or at least have a catcher in his face telling him to run his fat butt around the field. Some of the stuff/antics I see HS coaches do makes me laugh and cry at the same time. JMO