Blade Bash

Blade Bash also known as Mineuchi, Sslap, and Swordslap is a recurring ability in the Final Fantasy series. It is a command ability that attacks a target and inflicts some sort of status ailment that immobilizes the target. It is associated with the Samurai.

Final Fantasy V
Mineuchi is a command ability learned by the Samurai at job Level 1. It damages an opponent equal to a normal attack and is meant to inflict Paralysis, but this never occurs due to a glitch, so it acts as a normal attack with the benefit of not removing Confuse, Control, or Sleep from the target.

Final Fantasy XI
Blade Bash is a Samurai Merit ability. It causes Stun and may inflict Plague.

Final Fantasy Tactics A2: Grimoire of the Rift
Blade Bash is an ability used by Parivirs. It deals weak damage and can Immobilize the target. It requires a bladed weapon to use, and is learned from an Ashura.

Final Fantasy Dimensions
The Paladin can use Pommel, learned at job Level 3. It deals damage and stuns the target.

Etymology
Mineuchi is a way of striking an opponent with the back of a one edged sword blade, such as a katana.