an acronym, commonly used on the Internet, meaning "holy shit, dude", derived from the infamous South Park feature film, 'South Park: Bigger, Longer, & Uncut' quote - Kyle Broflovski
Mr. Garrison: What did you say?!
Eric Cartman: Oh, I'm sorry, I'm sorry. What I said was: How would you like to SUCK MY BALLS, Mr. Garrison?
Kyle Broflovski: Holy shit, dude(HSD)...
Eric Cartman: Oh, I'm sorry, I'm sorry. What I said was: How would you like to SUCK MY BALLS, Mr. Garrison?
Kyle Broflovski: Holy shit, dude(HSD)...
by BenJAMSTER June 25, 2008

High Sex Drive.
Normally owned by males who masturbate to much. Can end in death of their girlfriend.
Unless the girl has it too...
Normally owned by males who masturbate to much. Can end in death of their girlfriend.
Unless the girl has it too...
Boy: Come here, *Grunts* Ooooh more.
Girl: Fuck stop that hurts!
Boy: You like it!
Girl: Stop! You have HSD...
Girl: Fuck stop that hurts!
Boy: You like it!
Girl: Stop! You have HSD...
by GeeHSDx October 24, 2008

Yo, let me get some of those HSDs!
by slsanity August 25, 2013

by JMannus May 26, 2011
