A form of depression but hiding your true depressive emotions to seem more happy in front of other people. Except you're not happy.
Person 1: "He's always so happy!"
His thoughts: "I wish people understood me. I'm not happy, this is just a cover up for my real emotions. I have smiling depression."
In Desert Bluffs, Night Vale, the surrounding desert, and the other desert that seems to exist in an alternate dimension, the Smiling God takes the form of a living light, brighter than the sun, whose rays seem to turn everything translucent. According to Cecil, it spreads "not always as light at all," but with the same malicious intent - implying that StrexCorp itself is a facet of the entity.
I am The Smiling God, you will obey me, you will listen to me.
"Snowmen smiling with your teeth" are part of the lyrics of a song called Winter Horrorland from Friday Night funkin'. Friday Night Funkin' is a game where you sing songs and most of the characters go "beep bop".
Lemon demon: "Snowmen smiling with your teeth. Fallen angels created with your meat!"
BF: " beep bop beep bop beep bop beep bop beep bop beep bop beep!"