shortchange

verb2

1. •
   To defraud (someone) by giving them less change than they should be given after a transaction.

   • I got shortchanged! I gave him $10 for a $5 item and he only gave me $1 back.
2. •
   To deprive (someone or something) of something due; to treat unfairly; to cheat, deceive; to half-ass.

   • The elective class was easy, but in the end I was shortchanging myself by taking it.
   • This article's sparse discussion of tax-policy implications shortchanges the subject.