Arabic slang for "fingering". Where the 3 indicates the Arabic letter 'ein'
The following hang gesture
may accompany this word:
Hand up, palm facing forward, fingers pointing up, except for the middle
finger, which is pointed forward. The hand is thrust backwards and forwards in a "fingering"
motion.
Can be used to indicate when someone has been "owned", been made to look like a fool, or been disproved.
Your friend
talking to a girl: "Hey baby, wanna go back to my
place?"
Girl replies: "Hell no!" *
SLAP*
You give the ba3boos gesture: "BA3BOOOOOOOOOOOOOOOOOOS!!!!"