auf meinen Nacken

The phrase „auf meinen Nacken“ (literally 'on my neck') means 'it's on me / I'll cover it' and signals that you are paying for others or taking responsibility. It spread mainly through German rap and hip-hop (e.g. Ali Bumaye, Capital Bra), and is commonly traced to youth-slang use among young people with Arabic or Turkish backgrounds. In 2018 „Auf dein Nacken“ was a nominee for Youth Word of the Year (the winner that year was „Ehrenmann/Ehrenfrau“). In casual speech the accusative ending is often dropped, so you also hear „auf mein Nacken“.