haglabah 

A made up language for the purpose of subtitling text over in English when you can't remember your lines.

Haglabah glabaraha flaglabah hagagugla!

haglabah by mugworp June 8, 2003

hallabahoo 

No one knows what a hallabahoo is

Friend 1: knock-knock
Friend 2: who’s there?
Friend 1: hallabah
Friend 2: hallabah who?
Friend 1, 3, 4, 5, 6, 7: HALLABAHOO

hallabahoo by I’m the sock around your heart November 10, 2020