When you forget what you were just about to say
Guy1: Shabab uhhhhhhhhhh
Guy2: yes?
Guy1: UHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
By itself, it means youth in Arabic. However, a lot of teens, particularly in the MENA region, have started using this word as an alternative to 'guysssss' or ''dudeesssss'.
Shabab, I have an idea. (used in a group chat for instance)