A period of drunkeness where one can no longer comprehend what is going on. A peson who is slamma jammd has slurred speech and can barely stand. Slamma Jammd can also be used to describe a person who shouldn't drive because they are too drunk, however it is funny to joke about said person driving.
O MY GOD I AM SOOOOO FUCKING SLAMMA JAMMD RIGHT NOW!!!! IM TOTALLY GOOD TO DRIVE!!!