Was actually from when I was 12, saw a shot of "mazinger" anime and had no clue what it was, had to choose an account name for a game called "blackshot" and since a picture of mazinger was near by I just thought why the hell not. Years later when I started osu I though again, why the hell not. Now it is commonly mistaken as coming from the zinger burger in kfc and I wanna change it lol.