A Japanese Lunch Box is the act of inserting a live squid into a woman's vulva, unbeknownst to her mind you, whilst engaged in coitus. After which the male releases ejaculate within the woman, while simultaneously snorting a line of sesame seeds, then taking a shot of sake, THEN slurping the squid/semen mixture out that pussy kid.
Yo, gave that bitch a Japanese Lunchbox. She didn't like it. Not one bit. Not one.