refers to Chinese character ι£ζ°΄.
ι£ (Feng) means 'wind' which stands for the (static) atmosphere. ζ°΄ (Shui) means 'water' which stands for running and changing. 'Feng' and 'Shui' produce and influence each other.
1. An auspicious sandwich
2. An insult used on people in Left 4 Dead who fail a charge
3. And insult used by people who manage to get one or more kill with a single charge in Left 4 Dead