onyakapon 

Black guy from Attack on Titan season 4 with a monster cock that has the ability to cause the rumbling

onyakapon has a big cock

onyakapon by Noodoos February 8, 2021

Onyankopon 

Used to describe a character from attack on titan with dark complexion. Typically also known as "the sexiest beast to ever live".

Guy 1: Onyankopon
Girl: Oh my gosh! That guy is such an Onyankopon!

Onyankopon by FourNineEditingMarks September 21, 2020