|1.||Holy black on a Popo!|
An exclaimation of disbelief, awe, or alarm. Coined by Team Four Star in their Dragon Ball Z abridged series.
It references the fact that Mr. Popo is the blackest fucking character in any anime. He is like, a step beyond black.
Goku: I am strong enough to defeat anyone-- HOLY BLACK ON A POPO! WHAT WAS THAT!?