cviv

Can either mean civ, as in civilization or sieve, depending on the context.
Colloquially is used as a term for a bomb, a blast cviv -> c4 (the additional v is dropped)

Hey that’s was a cviv of a party!

fengshui

a more exquisite way of saying to be good for you
something you like to do

omg this is so good for my fengshui