Roll cancel clip
For the purpose of this wiki, we'll refer as "clips" as anything that allows you to go out of bounds or go through a barrier (walls, doors, collision objects).
Probably one of the most notable forms of clipping in Super Mario Odyssey. RCCs require inputs in a quick succession and, more often than not, a precise positionning of Mario in order to clip. Some of the most notable ones would be Inverted Pyramid Clip (IP clip), Snow clip (Upstairs and Downstairs) and Metro Doors (mainly used for Luigi's Balloon World).
In order to execute this glitch you need to be positionned just right, execute a ground pound (jump + Z), initiate a quick roll out of that ground pound (X or Y) and immediately cancel it (Y+B or X+A).