I highly elated method of greeting a close friend or relative. Often displayed at barge parties where close friendswill engage specially designed ear woofers and shriek 'Halabasanta' through a mouthpiece in to the other person’s ear. The resonating sound vibrates across the mid section of their parietal lobe which can heighten the experience to such a degree as to cause mild inner scalp chaffing.
Use of the word 'Hallabasanta' can be seen as far back as 2002 when a young B. Kronarbuild first experimented with a normal 'common or garden' toilet roll tube and blerted the word Hallabasanta! in the ear of a unsuspecting friend who has since had to undergo extensive counselling.
Poindexter: Hey how large is the new mod file for the cheatpack for World of Warcraft XXXVII?
Milhouse: It's a hellabyte, yo!
Poindexter: Quit talking like that.