Damage Nullification is the signature technique that Botamo uses.
Damage Nullification is an ability in which the user is able to avoid being damaged. In the manga Botamo's slippery body simply had the ability to not take damage even from much stronger foes' physical and energy attacks (though it was implied there was a limit to his ability), however the force from attacks could still knock him around. In the anime he instead transports the damage or attacks delivered by an opponent to another dimension, negating the attack from even hitting him, and thus not causing him to even be budged by any attack. This allows the user to receive no physical harm and be able to fight for a longer period of time without ever wearing out or sustaining heavy damage.
In the Universe 6 and 7 Gods of Destruction Selection Martial Arts Competition, Botamo utilized this ability in his entire battle against Goku, much to his surprise. Thus, despite Goku's clear advantage in power, he was incapable of dealing any damage to the hairless bear, with Piccolo and Vegeta noting that Goku would probably need to go all the way up to his Super Saiyan Blue form if he wanted to hurt him. However Goku manages to find a way around Botamo's ability by throwing him out of the ring, resulting in a ring out for Botamo and Goku's victory.