On the tip of my brain

A jazz pianist performing a song was struggling to recall a name and said this nice malaphor. It is a congruent conflation of “on the tip of (one’s) tongue” and “rack (one’s) brain”, both meaning to struggle to recall or think of something. “On the brain” (obsessively) might also be in the mix, as the performer was obsessed with trying to remember a name. Perhaps “back of (one’s) mind” (referring to something one thinks of but with little conscious reflection) was also in the speaker’s thoughts. Kudos to Dan Geier for hearing this one and sending it in!