The phrase "to throw the weapon" means to forcefully launch or hurl a weapon, such as a knife or a spear, towards someone or something as a form of attack or defense. Full definition
You'll be able to run, jump, general moving around, showing the map and also throwing weapons down. (mkaugaming.com)
You're able not only shoot, but throw your weapons in any direction you want, which is helpful with knives when you're out of ammo for your guns. (slickstermagazine.com)
The in - game bonus increases the number of throwing weapons that the character can carry. (metalgearinformer.com)