Complete giberish. Means everything, and nothing. The phrase means what ever you want it to mean, though it was originaly heard in the game Half Life 2
Rick: What should we do?
Mark: Yabba My Icing??
Tom: Dude, I broke your cell phone.
Craig: Yabba My Icing bitch!
Mark: Yabba My Icing??
Tom: Dude, I broke your cell phone.
Craig: Yabba My Icing bitch!
by Jeremy Moore August 28, 2008

Said by zombies on fire in Half Life 2; reversed you can hear the zombies screaming "OH GOD HELP ME"
by Bespectacled Squid May 07, 2009
