سمسمه or سمسمة (semsema) = it means one sesame but it's also used as a nickname for Asma or any other name with a "s" and a "m" (soumaya, seema, Samia...), and it could be a name in itself aswell A sesame is considered cute in Arabic ; it's small, it's feminine (name gender), and it's light on the tongue when you say it. Some people say in arabic: she's cute like a sesame. So it's just a song about a girl like half of songs of this world....the other half is a about a boy

Hi ibn Battuta, sometime we say سمسم to describe the small thing, I heard the song but I didn't understand well the words because of the accent difference, but I think سمسمة is a name of a girl in this song, it is like a nick name means honey girl with beautiful small details in her face, as small nose small mouth and so on :)