Any of two or more chemical compounds, such as propyl alcohol and isopropyl alcohol, having the same molecular formula but different structural formulas.
If you searched for this word you are probably still in school and you are learning chemistry or maybe biologie. I know school is shit but secure that diploma and then get all the bitches you want.
A trip to a grocery store, convenience store, or gas station for the sole purpose of buying an excessive amount of junk food and sugary drinks, usually with friends. A chud run often happens late at night and ends with everyone involved hating themselves afterwards.