Comes from Halo 1. It is when you melee some one in the back of the head and kill them with one blow (schwack).
I was on Blood Gulch and came across a sniper he didn't know I was behind him so i gave him a schwack and took his sniper rifle then proceeded to go on a killing spree!
by G.B. October 17, 2005
by tyler VONhill December 02, 2004
by LingoGoddess June 24, 2017
by DONTSCHWACKME3001 October 23, 2009
by joey the gent June 19, 2011
Guy #1- "I've never masturbated once in my life."
"Dude, whatever!! You know you go home and schwack it like 6 times a day! I seen you!!!"
"Dude, whatever!! You know you go home and schwack it like 6 times a day! I seen you!!!"
by Marcos August 29, 2004
by Jabber September 29, 2003