1. Take a paper box or large crate
2. Force a person you hate (sieber or tate) into the box
3. Light the box on fire (homemade napalm makes it better)
4. Put a hose in the box
5. Sit on the box so they cannot escape
6. You have a Hellbox
Originating from random mathletes bored during the otherwise dull math meets which they attended, the phrase "HMC" is an abbreviation for "Hot Math Chick." Mathletes have been known to use the acronym sarcastically or more rarely seriously.
Man, check out the size of the polynomials on that HMC!