Zombie Slayer

Zombie Slayer is a multiplayer medal in Halo Infinite awarded for killing ten Infected in a row without dying in the Infection game variant.

It is represented by an image of a bloodied cricket bat.

Trivia
The medal graphic featuring a cricket bat is likely a reference to the 2004 film Shaun of the Dead, in which the titular protagonist prominently uses a cricket bat against zombies in several scenes.