A racial slur for demons in the anime "Kimetsu No Yaiba: Demon Slayer." Making fun of the fact that they die in the sunlight and are incredibly afraid of it.
"Shut your demon ass up bro! Your ugly ass definitely hates the light! You fucking SUNDUCKER!"
Matt opened up the door to what he thinks is an open house shouting, "SUP FUCKERS!" only to realize it was an all parent party. Afterwards Matt suffers from extreme levels of supfuckersshock.