Muth-labben

From Hebrew מות לבן (muth labbén), a phrase which appears in Psalms 9:1. What the phrase means is somewhat disputed, but it likely indicates either what motivated the writing of the psalm (in which case it probably means "the death of Labben" or "the death of the son" or "the death of the fool") or how the psalm was to be sung (in which case it probably denotes a specific musical instrument to be used for accompaniment, or an existing song whose tune was to be used, or it could mean something like "young boys' voices").