後ろ汚い

(1)not fair; marked by injustice or partiality or deception; "used unfair methods"; "it was an unfair trial"; "took an unfair advantage"

(2)フェアでない

(3)非正義、不公平または詐欺で特徴的な

(4)violating accepted standards or rules; "a dirty fighter"; "used foul means to gain power"; "a nasty unsporting serve"; "fined for unsportsmanlike behavior"

(5)認められた標準または規則に違反する

(1)