The last name belonging to a select group of handsome Japanese studs with firmly toned asses and great smiles. A Yonami can take a woman's heart with no effort at all, but will usually choose not too. This is due to extreme laziness and a complete disregard for regular ass hoes. A Yonami can get a girl in bed simply by saying "It's a nice weather today" and SLAPPING that bitch in the face. Yonamis are known for their plain white t-shirts, heavy drug use, ninja samurai skills, and shitty English.

When you eat dirt for the first time and leave your family to build a shack in the woods