プログレッシブ和英中辞典(第３版)の解説
まけいぬ【負け犬】
〔敗者〕
- 今さら何を言っても負け犬の遠吠えだ
It's 「no use saying [just like the howling of a defeated dog to say] anything now. - 負け犬になるつもりか
Are you going to just walk off dragging your tail between your legs?