Keep him off with your left, and cross him to your right.
4 seconds sound clip from the Palooka (1934) movie soundboard.
You can hear this line at 01:17:28 in the Blu-ray version of the movie.
Quote context
[...]
- That round was yours by a mile, Joey.
- I can do better, Dad, if he'd keep that left out of my face.
- You certainly surprised me. You sure learned a lot from your Dad.
- Joe. Look what I tell you, huh?
- Keep him off with your left, and cross him to your right.
- That sucker can hit. Are you all right now, Mac?
- Walk around him, Joe. Keep punching. Keep punching.
- I tell you, Blacky. Coakley wouldn't lie to me.
- Hey, listen you Pelican I just heard you bet all your little purse on McSwatt.
[...]