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.
Bonk GWK
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.[1] 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.[1]