skate on (something)
1. Literally, to use roller skates, inline skates, ice skates, or a skateboard on some particular surface or area. You've got to be absolutely sure about the thickness of the ice before you go out skating on the frozen lake. We've had a real problem with kids skating on the long handrails of the staircase that leads up to the entrance of our office building.
2. To escape punishment for a crime or wrongdoing; to be acquitted of charges for a crime. No one could believe he skated on the charges, with many believing someone had influenced the jury to acquit him.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
skate on something
to skate on a particular surface. You can't skate on that ice! It's too thin. Don't skate on the ice until it has been scraped smooth.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.