You throw your weapon with all your might, attacking at range instead of up close.
STR 13, melee piercing or bludgeoning weapon
You make a ranged attack with a close-combat weapon. The max range is equal to 5 feet per STR bonus point. Treat the attack as normal for hit chances. The attack does 1 point of damage, no matter what weapon was used.
Obviously, you are now disarmed and have no weapon.