The word MONBEBE is a combination of two words; "'mon" & "bebe". The word "mon" means 'my' & "bebe" means 'baby'. Both words are in French. They have said themselves that the fandom name is the equivalent of, 'my baby', 'my darling', 'my lover', 'my soulmate. The members themselves of MONSTA X had supposedly came up with this name.