A fork of Rural Dictionary
1) H20. More commonly known as water.
2) The compound which one Southern California town beileved was an extrememly harmful chemical after receiving a fraudulent warning letter. They pondered banning styrofoam cups after discovering 'dangerous' dihydrogen oxide is used in producing them.
John was thristy so he drank some dihydrogen oxide.
"Ban dihydrogen oxide! It is a dangerous chemical!"
"That joke was funny, maybe 4 years ago."