Dabbin' or Sneezin'
Dabbin' or sneezin' is when someone else covers their mouth with their elbow, and you think they're about to say something stupid or start a fight.
My sister sneezed and yelled at my brother for no reason.
My dad sneezed while he was arguing with my mom, and it was like a sneeze war.
At the store, I saw someone sneeze and drop their bag of chips.