2 definitions by chemistrygirl321

1
CN - used to describe someones hotness as deadly, referring to the deadly chemical compound cyanide.
"OMG he is sooooo CN"
"Dude, that girl over there is CN as f*ck"
by chemistrygirl321 March 09, 2018
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2
When you can't live without someone, you call them O2 because you can't live without them (like you can't live without oxygen).
"Ugh I like him so much, he is so O2"
by chemistrygirl321 March 09, 2018
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