A cloud of rancid-smelling gas, released from the anus. It is usually possible to detect what the releaser has eaten when it makes contact with your nose.
Aw man, chris had steak last night, I can smell his beef cloud from here!
A hardo is a person who tries extremely hard at everything. Most times a hardo will try very hard at things that do not require excessive effort. For example, sports practices, gym class, etc.
Wow did you see Jack at practice today? What a hardo!