During intercourse, one partner spreads their gaping asshole wide open for the other to vomit in. The vomiter then proceeds to eat their own vomit out of their partner's ass.
Partner 1: Ohh Jeremy, I love it when you vomit in my butt!
Partner 2: I love your sloppy lunchboxes, Derrick!
Partner 2: I love your sloppy lunchboxes, Derrick!
by boobfartsmcgee July 30, 2016
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.
by cunt rage December 16, 2015
Hey Mike, have you heard that Susan packs a square lunchbox? I know, I was looking foward to asking her out on Tuesday. Looks like I'll be forever alone.
by SpookyGhoul March 28, 2011