“Beat on the Brat” is a song by American punk rock band Ramones, from their eponymous debut album.
“Beat on the Brat” was said by Joey to have origins relating to the lower classes of New York City.
When I lived in Birchwood Towers in Forest Hills with my mom and brother. It was a lower-class neighborhood, with a lot of trashy lower class women who had horrible brat kids who were obnoxious. There was a playground with women sitting around and a kid screaming, a horrible kid just running around rampant with no discipline whatsoever. The kind of kid you just want to kill. You know, ‘beat on the brat with a baseball bat’ just came out. I just wanted to kill him.
— Joey Ramone
Dee Dee, however, explained that the song was about how “Joey saw some mother going after a kid with a bat in his lobby and wrote a song about it.”