look up any word, like muddin:
A process that erases all of the data on a computer's hard drive.
Damn! I had over 50 gigs of GILF porn until my computer fucked up and I had to format my hard drive.

Its GILF porn time! Oh yeah, I forgot I had to format my hard drive. FUCK! I HAVE NO REASON TO LIVE NOW!
by anonymous69 December 15, 2005
More geek talk; the act wherein the geek's penis is pleasured, causing it to become erect (hard drive) and pleasured some more until it ejaculates (format).
Steve Urkel: Would you please format my hard drive? (Points at crotch)
Rachel: Okay. (Kneels down)
by DirkD January 21, 2007