Example "Su who is this "
meaning, swipe up who is this?
Or
Person 1: did u see Madison's Story??!
Person 2: no, show me
Person 1 k, I'
ll send u a screen shot
Person 2: SU! SHE GOT A NOSE PIERCING??!
meaning
Shut up! she got a nose piercing?!
Shut up in the
way of saying, No
way or Omg really?!