comedown

Etymology

come + down, from the verb phrase.

noun

1. A sudden drop to a lower status, condition or level; a disappointment or letdown.
   I have to say it again, my Dearest Friend. What a wonderful Comedown for the Godhead! What a wonderful Comeuppance for Humankind! That’s because You, Lord God, Creator, Bellows Maker of All That Breathes, deigned to come to my hovel of a soul; once there, to fatten up the leanness of my soul with the plumpitude of Your Sacrament; that’s to say, with the plenitude of Your Divinity and Humanity. 2000, Thomas à Kempis, “[The Sacrament of the Altar: How to Prepare for It & What It Tastes Like] Frequency”, in William Griffin, transl., The Imitation of Christ: How Jesus Wants Us to Live[…] A Contemporary Version, HarperSanFrancisco, page 238
2. A calm, mellow period experienced after the initial high from taking drugs.