look up any word, like bae:

1 definition by Scomandy Van Shlervin

 
1.
A pun combining the chemistry term Diastereomer and disaster;it is used to describe a person with excessive knowledge in chemistry. A chemistry know-it-all.
"I hear your friend aced that chem exam; for all intensive purposes he's a total disastereomer."
by Scomandy Van Shlervin March 07, 2009