This web content reveals a hidden easter egg in the man command. When run without specifying a page or with -w, it outputs “gimme gimme gimme” to the error message at 00:30. This surprising message is present in various Linux distributions like RHEL, OpenSUSE, Fedora, and Debian. The code responsible for this output was added to the man command in a commit. The string itself comes from the ABBA song “Gimme! Gimme! Gimme! (A Man After Midnight)”. The developer of the man-db, Colin Watson, has removed this easter egg to prevent further confusion.
https://unix.stackexchange.com/questions/405783/why-does-man-print-gimme-gimme-gimme-at-0030