be on at

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be on at

1. To be televised at a particular time (which follows "at"). The movie is on at 8, so I'm going to start making the popcorn now.
2. To nag someone about something. In this usage, "at" is followed by a noun or pronoun. Ugh, my mom is on at me all the time about my grades, but I just have no interest in the classes I'm taking this semester.
See also: on
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.

be on at someone

nag or grumble at someone. British informal
See also: on, someone
Farlex Partner Idioms Dictionary © Farlex 2017

be/go/keep ˈon at somebody (to do something)

(informal, disapproving) keep criticizing somebody or telling them what to do, etc: He keeps on at her all the time about her smoking.
See also: go, keep, on, somebody
Farlex Partner Idioms Dictionary © Farlex 2017
See also: