down at heel

adjective2

1. •
   In poor condition, especially due to having worn heels; worn-out, shabby.

   • A pair of Oxford-mixture trousers […] fell in a series of not the most graceful folds over a pair of shoes sufficiently down at heel to display a pair of very soiled white stockings. — 1836
2. •
   Shabbily dressed, slovenly; impoverished; shabby, dilapidated.

   • He was a queer shoot, again, in his unkempt longish hair and slovenly clothes, a sort of very vulgar down-at-heel American in appearance. — 1916