The basis of this word comes from bento, that is, hang up and leave ~ ~ bento is not explained, as everyone knows ~ ~
There are too many Xiao Qiang and worm characters in the animation now, so it's hard to get a lunch. It looks like a bento every time, but I didn't get it. I can only call it a tucao bento ~ ~ ~
It seems that there is no source, just a naturally derived word ~ ~ ~