Why the hell are we arguing about the definition of "glitch," this is ********.
I don't like using the term glitch because people associate a glitch with a negative connotation, i.e. cheating. WD'ing is obviously not cheating, but since some people seem to want to marry the term glitch and cheat, I have no choice but to try and defend its "glitch" status.
Also, the effect is a glitch, not the execution. Shooting a wall 27 times and then jumping isn't a glitch, but what happens afterward may be. If doing this causes the game to crash, the game crashing is the glitch, not the shooting the wall.
Jumping and airdodging into the ground is not a glitch, but what happens afterward might be. In this case it isn't, because you slide as the game was programmed. If you air dodged through the floor, and the game crashed, that would be a glitch.
cause != glitch
effect = glitch
A glitch has to do with error in the code, not "programmers intent."