beat on

present singular third person beats on · participle present beating on · participle past beaten on

1. figurativelyintransitiveTo talk at length; to go on and on; to rant or expound.

   She's beating on about poor service.

2. figurativelytransitiveTo criticize, impugn or shed a bad light on (a group or topic) for political gain.

   You guys are always beating on immigration, but it won't win you this election.

   1 more example

   She's unpopular enough that photos of her are used in elections to beat on liberal candidates.