Hit the wall for my brother, which means I like my brother very much and love him very much. This brother generally refers to the person I like, but sometimes I am willing to do anything for my favorite brother, because sometimes my brother must love you very much. At this time, you are willing to do anything for him, no matter what you pay for him, you are willing and worthwhile.
This sentence is very popular in Tik Tok these days. Another sentence with the same meaning as him is crazy for my sister, crazy for my sister, and hitting the wall for my sister. They all mean to like someone, so they are infatuated with them, just as those fans are infatuated with their idols.