This dear is a problem in translation
Here is his title in chinese:
七刀流
流 have a number of translations, here it should mean "style".
Like Roronoa Zoro's Santoryu, his is Nanatoryu
But.. watch this, 流氓 is:
rogue, hoodlum, thug etc
And THAT for some reason, is the translation they used.

Let us all jump up and down in joy at their failure