"Creates a dimensional hole that swallows normal Ki Blast moves! If it connects, an explosion will erupt behind the opponent and blow them forward!"
The user opens a dimensional portal in the fabric of space-time right in front of their face that swallows up an opponents ki blast and redirects them back at the opponent via another portal that appears behind the opponent.
This technique was used in the film by Super Janemba to redirect one of Super Saiyan 3 Goku's ki blasts.
Dimensional Hole was first named in Dragon Ball Xenoverse 2 where it appears as one of Super Janemba's Super Skills which can be obtained by the Future Warrior (Xenoverse 2) as a reward in Parallel Quest 80: "The Return of the Great Ape-Fest!".