It's just names of two element but when their symbols are put together, it forms
NiGa which is means
the N-word. It is used to hide the fact that you are saying using the N-word in a sentence while trying to avoid racist
backlash.
A:Hey my Nickel Gallium
B:
What you sayin?
*B
spents 5 minutes thinking*
B:
BITCH YOU HAVENT GOT THAT PASS, I AM CALLING THE POLICE