負け犬

Meaning

1. n
   loser; failure; underdog; unsuccessful person; non-achiever; loser dog
2. n
   unmarried and childless older woman

Example sentences

• 負け犬になるわけにはいかない。

  I can't stand getting beaten.

• 私は30代未婚の愚かな負け犬女です。

  I'm a stupid old maid in my thirties.

• 負け犬とつるむな。

  Stop hanging out with losers.