It means "AXE."
Money Heist Season 1, Episode 5
His AXE from the Blackwater.
Game of Thrones Season 4, Episode 4
She swung an AXE at me.
Game of Thrones Season 1, Episode 9
Hit troll with AXE. Hit troll with AXE.
The Big Bang Theory Season 4, Episode 6
SHELDON:
Hit troll with AXE.
The Big Bang Theory Season 4, Episode 6