A heavy lump of metal on the end of a stick for bludgeoning, chopping, whacking and generaly hurting anythign that gets in the orks way.

It's a stick... with a bomb on it.  Right?  Throw them and they go BOOM!

The slugga is the normal side-arm for an Ork at war.  It's high power and recoil comes from the solid metal projectiles (or slugs) that they fire.

The Shoota is the standard wepaon in the ork armoy, it's high rate of fire, high power, poor workmanship and dreadfully bad accuracy make it an unpredictable weapon, to be feared when used on mass.