Glitchy Wall Kick
A glitchy wall kick, or GWK for short, is a wall kick where Mario ends up wall kicking along the wall instead of away from it.
A bonk GWK can occur when Mario bonks on a wall then bonks on a ceiling, another wall, or out-of-bounds within the 5 frames he can wall kick. This makes Mario wall kick away from the second wall in the direction of the first wall. Bonk GWKs can never be firsties.
Quarter Frame GWK
A quarter frame GWK can occur when one of Mario's first 3 quarter steps enters a wall, a ceiling, or out-of-bounds, and the last quarter frame enters the hitbox of a different wall.