Comes from the fact that L denotes liquid. Nitrogen is diatomic, thus forming N2 gas normally, but under extreme cold, it is a liquid. Has a boiling point around -180 degrees celsius.
Otherwise known as some fun stuff to play with.
I stuck my dick in the LN2 and when it froze, I karate chopped it and it shattered into about 50,000 pieces.
LN2 = Long Number 2 ( extra big stinky poop)
babe I need 10 more min. I have LN2 it just keeps comming out. I will need pot plunger to help flush,I just hate it when water & shit gets all over floor...