Snowmen smiling with your teeth

"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!"